It's not that hard. You can find them in the Yagaruma Forest past the town with the second gym or the forest area to the east of Raimon City.. They appear fairly often in the shaky grass. --- http://i38.tinypic.com/2zqtqur.jpg http://img255.imageshack.us/img255/1011/picture3e.jpg
The monkey you receive is supposed to complement your starter pokemon. You should receive the red monkey who will really help your team. As has been posted, watch for the shaking grass in the forest and you should find the other monkeys.
The elemental monkey's ... what? You did use an apostrophe, which implies that the monkey possesses something, but I'm VERY CONFUSED OMG. --- "If the Pokemon I liked were there, I'd go anywhere. That's what a real Trainer does." ~ Ace Trainer Emma, Union Cave (HG/SS)