013 - Weedle

I'm still not convinced that this isn't simply Wiggler from Mario in cosplay.

012 - Butterfree

Yeah, he looks more like an evolution of Venonat, but this guy always had a place on my team beginning of game. 

011 - Metapod

I won't lie - trying to figure out how to make this guy into an interesting but useless 5th Edition monster was an interesting exercise. There's a reason it's a CR 0.

010 - Caterpie

Not that the OG starters aren't fun, but I've been looking forward to getting through them so I could get into some of the other evolutionary lines. Caterpie is, despite actually being nothing more than bird food, one of my favorite early game catches.

009 - Mega Blastoise

Thick thighs save lives and also let you carry a Howitzer on your back.

009 - Blastoise

Look at that smug look on his face. He knows you're not getting through that shell. I kind of want to wipe it off with a blast of water from one of his cannons, honestly. He's still a prime starter choice for late game though thanks to Swim.

008 - Wartortle

Your guess is as good as mine as to what's going on with this evolution design. I already used up my puberty material with Charmeleon.