I have played every kind of deck except fire and psychic(my two least favorite types, i know psychic is good but i just don't like it). All of them do pretty well.
I have seen so many people diss on plant and electric. That really pisses me of.
Anyways here's my analysis of the colors of pokemon:
 
Grass: one of my favorites. Venusaur is awesome doing 60 for only 4 unlike blastoise doing 60 for 5. koffing is also awesome either doing confusion or poison. Now this really makes me mad--people don't respect tangela!!!!!!!!!!! Poison powder doing 20 and AUTOMATICALY poisoning, bind does twenty and has 50 percent chance of paralyzing. It is better than ivysaur because it's basic. I don't even need to say that grass is the EMPEROR(Hey,I wanted to use something different for a change) of status effects.On a scale from 1 to 5 I give it a 4.
 
fighting: the fastest type. my freind has an almost INVINCIBLE fighting deck with a lot of thought put into it. Hitmonchan and machop being some of the fastest basics. machamp is good with his pokepower. Almost an equal to venusaur. Dugtrio is awesome doing 70 damge for 4 fighting. Diglett is kind of crappy with 30 hp, if it had 50 it would be pretty good. On the scale i give it a 4.5
 
fire: don't even ask. The top WORST type. Almost all of these losers have to discard for their crap attacks. I don't even feel like writing anymore on this garbage--on to the next type.(oh, on the scale i give it a 2)
 
psychic: I know they are powerful but I never liked psychic.Alakazam's pokepower is just about the BEST in the game. Everbody else except mewtwo sucks(I thought mewtwo was the most powerful pokemon, what the h*ll happened??????) "What about kadabra?he can do 50," you ask. Yeah, he can do fifty---if if ever gets enough energy before he gets KOd.I give it a 3.5
 
electric: iv'e seen so many people diss this type.MAN!!!!!!!!!!!!! Zapdos-resistance to the kost popular type.Raichu-50% chance of no effects or damage plus does 20.Electabuzz-second turn 30 or 40, first turn 10 and 50 chance of paralyzing.
This is the second fastest type. Great with fighting for a haymaker. on the scale I give it a 4.
 
water-my favorite type. Blastoise and poliwrath rule the sea with an automatic 40 damage plus energy removal and the all-might RAIN DANCE(the most powerful pokepower). Water basics suck though. the only good one is poliwag doind up to 30, hey look on the bright side-it can kill a charizard in one hit.All water has is paralyzing with star freeze, bubblebeam, ice beam and bubble. I'd give this one 4.5
 
colorless: not really a real type. chansey is good with 120 hp and scrunch. Double-edge is good for those games where you only have one prize left. Dragonair is awesome with hyper beam . It's down side is dragonair's hp with only 80. Good thing is it doesn't have a weakness. I'd give this one a 3.5.
 
    Well, it's eleven o'clock and you might be able to tell by my writing that i'm gettin' tired. Good night and see ya' all later.
 
reach me at branfam@gte.net