Also love how he made it a callback to the original intention of Yoshi being a Koopa - his saddle is a shell!
Although he made it Mario series instead of Yoshi series down in the corner.
My guess would be just characters/series that appeared in NES games because Yoshi is looking all weird in degenerate until 1990. Diddy is straight up missing.
I noticed Daisy was missing, because of course I did.
Granted, I didn't notice that for a while because I was focused on raging at the Devil aka objectively the worst Assist Trophy.