About ten steps forward... Five floating blocks. A familiar set of ? blocks and Brick blocks, in "B?B?B" formation. Above them is the usual one more block, yet this one is oddly... donation box shaped??? Upon whacking this block, a single coin pops out, and one grouchy Reimu.
Unfortunately, the plumber lacks knowledge of spellcard rules, has a fullsize hitbox, and low-mid movement speed. Also no flying so things aren't looking too good :V
(alt. answer: He'd be good friends with Marisa, they both can make good use of mushrooms. Their names are even similar!)
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What if while playing baseball (or any other ball-sport) someone hits the ball which then flies low and accidentally knocks Sekibanki's head off? :ohdear: