Robert E. O. Speedwagon (ロバート・E・O・スピードワゴン, Robāto Ī Ō Supīdowagon) appears in Diamond Records as a playable character in both the Action Battle and Tactical Battle game modes. He has a few unlockable statues of the 'Courage' type, ranging from 3 stars to 5 stars.
Speedwagon's moveset in both game modes is comprised of various attacks using his saw-hat, his sledgehammer, and calling in Tattoo and Amato to assist him.
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Moveset
Speedwagon's basic attack string is a combination of up to five various strikes. In Tactical Battle, this is cut down to only three hits.
Speedwagon throws his saw hat out in a circular motion around himself, repeatedly damaging any opponents near him. (Unlockable)
Speedwagon calls both Tattoo and Amato to fight opponents alongside him for a little bit. In Tactical Battle, they both only appear to do one attack on a single opponent before leaving. (Unlockable)
Speedwagon calls Amato to jump-kick an opponent. This attack replaces SP Skill 1 in Speedwagon's 3 star statue.