I used to main Olimar back in the days. But I still play him competitively and for fun. Some of my memory may have escaped me but I designed this move set tier list.
I believe some of it is inaccurate but that's what these boards are for right? May edit as necessary.
Top
Dthrow
Fair
Upsmash
Bthrow
High
Uthrow
Bair
Fsmash
Nair
Upair
Dsmash
Pikmin Chain
Middle
Latch Pikmin
Dair
Pluck
Whistle
Fthrow
Low
Ftilt
Standard Attack
Dash attack
Dtilt
Pummel
Up tilt
I believe some of it is inaccurate but that's what these boards are for right? May edit as necessary.
Top
Dthrow
Fair
Upsmash
Bthrow
High
Uthrow
Bair
Fsmash
Nair
Upair
Dsmash
Pikmin Chain
Middle
Latch Pikmin
Dair
Pluck
Whistle
Fthrow
Low
Ftilt
Standard Attack
Dash attack
Dtilt
Pummel
Up tilt