Fighter
Captain Falcon admired how fierce Olimar could be. He was ranked as one of the best fighters, second only to Meta Knight, and for good reason. Though many would complain he was "cheating" because the Pikmin did most of the fighting, Falcon thought it balanced everything out. It only made sense that someone so small would need help to take down any one of the other fighters. Their teamwork was impeccable, which was to be expected, given that those very same strategizing skills saved his life a while back. It made him a challenging opponent.
It also made him aggressive. It wasn't as annoying as it was amusing–this little alien walking around the mansion pushing people out of the way and smart-mouthing everyone.
Captain Falcon was the only person he was remotely nice to. And though he had a temper on him, the little guy was usually victim to tickle fights and being scooped up and carried around.
He'd just huff and cross his arms, scolding Falcon for his actions, saying he was making him look soft. Falcon would just grin and say "But you're a lover, not a fighter!"