Olimar is from pikmin 2 and pikmin 3,. His main attacking moves are throwing these pikmin 2 creatures at the foe. 

WHen you press start as the olimar, he spanws into the map with three pikmin of various colours. when he sadly dies or selfdestruck he ONLY gets two of various colours.

the b buttn is used to summon more pikemon with a grand total of four of various colours, shapes and sizes. Let me name off the races of pikmen. Red yellow purplewhite blue and even those colours do differtn things, they ALL are very very useful.... each hav thier very own backstory in pikmin 1 and pokemon 3. please support nintenddo by purchasing those games to read their lore!! but in project m the pikminn are EQUALY valued and importannt.

so okay game plan is here. captin olimar can TOSS pikmin at enemies and do damage. This is the main idea of character in playing him. the player should avoid being hit by enemies, while hitting emenies with his pikmin which are coloured as stated above. 

By press side B (left or right; NOT UP OR DOWN THOSE MOVES ARE very WRONG) you wll thro pikmin that grab hold of enemy and then they do damage by whacking their leaves or buds or flowers onto them. Another good move is jumping by pressing yx or tap jump and then you press cstick which is a colour similar to yello pikmim. try to press the yellow stick forward or backward like with side b but DONT press b during this or you will just look stupid and go 0-2 in pools.

Thas basically all their is to it. My cpu is laggy so im done for now, but please enjoy the captain of olimar and playing him :>