Rubber Boy quick stats
| Level | Cost | Damage | SPA | Range | DPS |
|---|---|---|---|---|---|
| UPG 0 | 300¥ | 17 | 3.4 | 10 | 5 |
| UPG 4 | 1,100¥ | 53 | 2.5 | 12 | 21.2 |
Complete upgrade table
Every row below was transcribed from the official support Wiki on Jul 19, 2026. A 0 DPS value means the official table leaves DPS blank for a non-attacking farm unit.
| Upgrade | Cost | Damage | SPA | Range | DPS |
|---|---|---|---|---|---|
| UPG 0 | 300¥ | 17 | 3.4 | 10 | 5 |
| UPG 1 | 600¥ | 26 | 3.4 | 10 | 7.65 |
| UPG 2 | 825¥ | 35 | 2.6 | 11 | 13.46 |
| UPG 3 | 900¥ | 42 | 2.6 | 12 | 16.15 |
| UPG 4 | 1,100¥ | 53 | 2.5 | 12 | 21.2 |
Abilities and passives
- No passive or active ability was documented for this unit in the release ability guide.
How to get Rubber Boy
Acquisition and rarity were not independently confirmed; inspect the live index or banner pool.
Published drop rate: Not listed · Published pity: Not listed
Best traits
- Strength II — prioritize the unit's main role before chasing marginal stat gains.
- Bolt — prioritize the unit's main role before chasing marginal stat gains.
- Limit Breaker — prioritize the unit's main role before chasing marginal stat gains.
Strengths and weaknesses
Strengths
- Physical damage gives the unit a clear team job.
Weaknesses
- Field slots and upgrade cost still compete with other carries.
- Performance depends on enough economy to reach the strongest upgrades.
Recommended partners
- Forbidden Teacher — Magical damage support complements Rubber Boy's physical damage slot.
- String Demon (Awakened) — Magical area DPS and control complements Rubber Boy's physical damage slot.
- The Hero — Physical damage support complements Rubber Boy's physical damage slot.
Best game modes
Best considered for Story progression, Raids, and boss teams with enough economy and support to finish its upgrade path.
Tier list placement
D-Tier: Published rankings treat it as an early filler with no meaningful passive contribution to justify continued investment.
Worth summoning?
Low priority for scarce materials until your core team is complete or the unit's niche is specifically needed.
Sources
- Official support Wiki unit page — accessed Jul 19, 2026.
- progameguides.com
- allthings.how
- progameguides.com
Facts are source-linked and rewritten for this independent fan Wiki. Strategic recommendations and tier judgments are our editorial analysis.
Last updated: