Key takeaways
- Boss and single-target stages: his area damage is partially wasted when only one enemy is on screen, and his per-hit damage is not high enough to burn down a boss before it reaches your base.
- Late-game and raid content: enemy HP pools outscale his damage output, and no amount of positioning fixes a stat ceiling.
- Max-level investment: because his upgrade cost is cheap, maxing him feels productive, but it does not change his role. Players sometimes over-invest in Boo Kid expecting a tier jump that never arrives.
Is Boo Kid OP in All Star Tower Defense (ASTD)?
No—Boo Kid is not overpowered in All Star Tower Defense. He is a solid, farmable early-to-mid game unit with a cheap total upgrade cost and surprisingly good group coverage, but his single-target damage, slow placement rate, and weak late-game scaling keep him well below the top-tier meta units. If you already own him, he is worth leveling; if you are deciding where to spend your gems, he is a side project rather than a priority.
Boo Kid at a Glance: Stats, Cost, and Role
Boo Kid is a Boo-type unit in All Star Tower Defense, obtainable from the standard summon pool rather than a limited banner, which is the main reason he shows up so often in player inventories. Per the in-game unit description and patch notes, he is positioned as a crowd-control damage dealer: his attacks hit multiple enemies in a radius rather than a single target, and his upgrade path is deliberately cheap so that newer players can afford to take him to max.
The trade-off is baked into that design. Cheap upgrades and area coverage come at the cost of raw per-hit damage, and Boo Kid’s total damage output falls off sharply once enemies start carrying high HP pools in later stages and raid content. He is a unit that performs best in the exact content you outgrow fastest.
Boo Kid Damage, Range, and Upgrade Costs vs. Comparable Units
The table below compares Boo Kid against the two units players most often weigh him against: a standard single-target damage dealer in the same rarity tier, and a premium meta-tier area unit. Figures are based on the units’ in-game stat panels and upgrade menus, and are given as representative values for a maxed unit rather than exact frame-by-frame numbers.
| Unit | Rarity / Source | Role | Approx. Max Damage (per hit) | Range at Max | Total Upgrade Cost | Placement Cost |
|---|---|---|---|---|---|---|
| Boo Kid | Standard summon pool | Area / crowd control | Moderate, hits multiple targets | Above average | Low | Low |
| Standard single-target dealer (same rarity tier) | Standard summon pool | Single-target DPS | High on one target | Average | Moderate | Low–moderate |
| Premium area unit (meta tier) | Limited / event banner | Area / burst | Very high, hits multiple targets | High | High | High |
Three things stand out from that comparison. First, Boo Kid’s upgrade cost is the lowest in the group, which means the gap between a fresh pull and a maxed Boo Kid is much smaller than for a premium unit. Second, his placement cost is low enough that you can field him early without stalling your economy. Third, the premium area unit beats him on every damage metric—which is exactly what you would expect given the difference in acquisition cost.
Where the Numbers Actually Favor Boo Kid
Run the upgrade cost against the damage gained and Boo Kid looks considerably better than a raw damage comparison suggests. A premium unit typically costs several times more to max out, and the damage increase over Boo Kid does not scale at the same multiple. In a stage where enemies arrive in tight clusters—which is most early and mid-game waves—Boo Kid’s multi-target hits effectively multiply his per-attack output, closing much of the gap on total damage dealt per wave even though his single-target numbers look unimpressive.
That is the honest case for him: not that he wins a damage contest, but that he delivers a large share of the practical output for a fraction of the investment.
Where He Falls Short
- Boss and single-target stages: his area damage is partially wasted when only one enemy is on screen, and his per-hit damage is not high enough to burn down a boss before it reaches your base.
- Late-game and raid content: enemy HP pools outscale his damage output, and no amount of positioning fixes a stat ceiling.
- Max-level investment: because his upgrade cost is cheap, maxing him feels productive, but it does not change his role. Players sometimes over-invest in Boo Kid expecting a tier jump that never arrives.
Decision Matrix: Should You Use Boo Kid?
Whether Boo Kid is worth your time depends far more on your account than on his stat sheet.
| Your Situation | Verdict | Reasoning |
|---|---|---|
| New account, few gems, clearing early story stages | Use him | Low placement and upgrade cost means he comes online fast and covers clustered waves well |
| Mid-game, farming standard stages for resources | Useful as a secondary | Good wave coverage, but pair him with a single-target dealer for bosses |
| Building a raid or boss-focused team | Skip | Damage ceiling is too low; slots are better spent on high single-target DPS |
| Already own multiple premium area units | Bench him | Premium units outperform him on damage, range, and late-game scaling |
| Going for collection completion | Level him eventually | Cheap to max, so the cost of completing him is low relative to other units |
How to Get the Most Out of Boo Kid
If you are going to run him, place him where his radius overlaps the longest stretch of the enemy path—typically a corner or a U-bend—so each attack connects with as many enemies as possible. Because his upgrade cost is low, prioritize his damage upgrades over range early; the range gain is real but the damage gain is what keeps him relevant for one more stage tier. Pair him with a cheap slow or stun unit so enemies stay inside his radius longer, and always keep at least one dedicated single-target dealer on the team for the boss wave.
The most common mistake is treating a cheap upgrade path as a signal that the unit is secretly strong. It is not—it is a signal that the unit is meant to be accessible. Boo Kid is a good value pick, and value picks have a ceiling.
Frequently Asked Questions
Is Boo Kid OP in All Star Tower Defense?
No. Boo Kid is a balanced, accessible area-damage unit, not an overpowered one. His cheap upgrade path and good crowd coverage make him strong value for early and mid-game content, but his single-target damage and late-game scaling are clearly below meta-tier units. Calling him OP overstates what the stat panel actually supports.
What is the best way to use Boo Kid in ASTD?
Place him on a bend or corner where his attack radius covers as much of the enemy path as possible, then prioritize damage upgrades over range. Support him with a slow or stun unit to keep enemies in his radius, and keep a separate single-target dealer on the team for bosses. This setup maximizes the number of enemies each of his attacks hits.
Should I max out Boo Kid’s upgrades?
Only if you have spare resources or are completing your collection. His upgrade path is cheap, so maxing him is not expensive, but it does not change his role or push him into top-tier damage. If resources are tight, spend them on a high single-target damage dealer first.
Is Boo Kid good for raids and boss stages?
Generally no. Raid and boss content rewards concentrated single-target damage, and Boo Kid’s area-focused kit spreads his output across multiple enemies. His per-hit damage also falls behind as enemy HP pools scale up, so he is usually benched in favor of dedicated DPS units for those stages.
How does Boo Kid compare to premium area units?
Premium area units from limited banners typically beat him on damage, range, and late-game scaling, but they also cost far more to summon and to upgrade. Boo Kid delivers a reasonable share of the practical output for a fraction of the investment, which is why he remains a common pick on newer accounts despite the lower ceiling.
Is Boo Kid worth summoning for specifically?
No—he comes from the standard summon pool, so there is no reason to chase him with premium currency. You will likely pull him naturally while summoning for other units. If you do get him early, he is worth leveling for story progression, but he should not be a summon target on his own.
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