Not only that his dashes and fireballs are waaay too much for everyone (though it's great that yoshi on IND is unaffected), his stomp is really annoying... I remember once while playing yoshi, i did a hop kick while he did that stomp-that-causes-a-uber-long-stun, and guess what? Yoshi was caught (even in mid-air!) and was stunned.
And yeah, fighting with him really takes the fun away...
Against other players: "Whoa! Ugh! Ha, take that! Oops! No no no! Ugh! Yes! Come on! A little more... Yes! Alright! Whew! Ha, who's laughing now?"
Against Jinpanchi: "Ha, take that! Whoa! Oh no... ... ... ... <Continue? Ten... Nine...>"