Olimar is a very powerful character. If it is a small arena then his final smash will knock everyone off the screen, if not it does a good amount of damage to everyone. I say just don't use the throw pikmin ability with him. they latch on the the character you hit. It does more damage throwing them in a regular strong attack. The best pikmin to use are yellow red and purple. I say go ahead and get rid of any white and blue that come out. And Olimar also has amazing recovery abilities. I've been knocked off screne with over 200% damage, and was still able to recover just fine.