Mmac
Smash Lord
Yoshi's Bair is a pretty big factor, as they out Prioritize his Air attacks, and Yoshi's Shorthop is perfect because it goes straight into Olimars Blindspot where his Smashes/Grabs can't hit. Also Egglay separates his Pikmin from him, and can take them all out with one shotOlimar forums rate Yoshi as a 60/40 matchup in Yoshi's favour. The reason for this is unknown to me (I don't have any trouble with Yoshi's, at all) but if both forums say Yoshi > Olimar, then it must be true :/
He has a thing, it's called Pivot Grabbing. It beats every single approach MetaKnight has. Not to mention that it usually ends up with a 2 Release Chaingrab to Usmash combo for +30% every grabYoshi doesn't have an advantage on MK. No character does, except perhaps Snake, so don't be ridiculous.