Is my team good. I am going to challenge the elite 4. Torterra lv.62 ..

I believe it's your first time facing the Elite Four. You should do fine with those Pokemon.

The only advice I can give would be to give your Pokemon various types of moves, instead of having multiple same type moves (I.e. Garchomp has three Dragon-Type Moves).

Good Luck!

Hope this helps!

Your team is very unbalanced. However if you only seek to beat the elite 4, you should do fine (only if you are facing them the first few times. Once they power up then you will need to level them up more.)

A pretty good team. Garchomp and Torterra should be your main weapons. You might want to level up Floatzel a bit more, even though he is a HM Pokemon.

Well, I think you shouldn't have ALL attack moves, maybe you might want to use moves such as reflect, barrier, light screen, and any other move that could up your attack, sp. Attack, defense, sp. Defense, or could help your Pokemon raise any other stat.
For example my Pokemon:
Empoleon- swords dance, ice beam, surf, drill peck
Staraptor- brave bird, close combat, fly, defog
Mew- barrier, flash cannon, amnesia, psychic
Torterra- reflect, crunch, leaf storm, withdraw
Infernape- swords dance, flamethrower, calm mind, rock climb
Electabuzz- thunder, screech, giga impact, thunder wave
You don't have to have all Pokemon having a stat power up, but at least have 2 or 3 to keep your chances good even having moves like thunder wave, sleep powder, or a move that can make your opponent fall asleep, be paralized, burned, poisoned, or even confused would help out. But otherwise, I think you have a pretty good team, haha let me correct myself, a kick butt awesome team!!! Hope I helped

I think you should level them up to 60 each and every time you challenge them again make shure their two levels higher