Robotboy, Robotgirl and Protoboy as Heros from TPC by ErykRogocz on DeviantArt

Protoboy, Hate Sink Wiki

Protoboy v. Atlas (Robotboy v. Astroboy) : r/DeathBattleMatchups

Please stop They are siblings by VickyChokWeiQi on DeviantArt

X 上的KatMaz：「Protogirl! #robotboy #protoboy #robotgirl @cartoonnetwork @Gaumont_Anim #illustration #art #cartoons / X

Robotboy-W [HyperActivation!!] by TindyFlow on Newgrounds

Steam Workshop::Deactivated Robotboy[RAGDOLL]

What if protoboy was fixed by a random professor after he turned evil? (Credit to kindah_is_here_UwU for this) : r/robotboy

Robotboy and Protoboy

Robotboy, The Revenge of Protoboy, Gus and the G-Machine, Full Episodes

Robotboy, Wiki