... Where'd you get a goldeen? 0.o
Unless the fisherman at the center is selling a lie.
I recommend technician meowth: Scratch, Bite, Fake Out, Growl/screech/whatever. Good speed, attack, and all around the beginning area.
Pachirisu would be useless except for bide. Then it eventually learns spark and becomes way more useful. Grimer, along with your trubbish makes for a nice tanking option with mud slap to help out the team when you switch it out or it falls in combat. Don't really have any other suggestions for ya.