How do you get to Lv. 100?

[Infinite Master Sceptile]

Is there an easy way to train all your Pokemon to level 100?
Because I have two on Colosseum that are in the 80s.

 

[Flame Haze SnS]

Keep battling in the Mt. Battle.

 

[ellie]

Well, if you have XD, you can do Orre Colloseum. The Pokemon there will always be the level of your highest Pokemon. I don't know if you can get exp. there, you can in all the other Colosseums, but I haven't gotten to that one yet. If not, just keep trainingon Mt. Battle like the above poster said.

 

[Eeveeboy_geoff]

I leveled my team to 100 on the seventh island in FR. The Pokémon belonging to the trainers there are quite high level... continously use the vs. seeker!

 

[Astinus]

Yeah, Mt. Battle is where I raised my Pokémon in Colo.

Haven't reached the Seventh Sevii Island yet. But I know that Nintendo says that's a great place for experience and money.

Whee for repeating!

 

[Espeon POWER!]

I know a paticence(SP) needed way on E/R/S Fight interviewers Gabby and TY but they only give each pokemon a bit over 1000EXP.

There is also the elite four for a less tideous training but tough training if your weak.

 

[Charizard86]

In R/S I battled the Elite 4 over & over & over again. When the pokemon is at a low level i used exp share and eventually when it was able to go one on one with any of the Elite 4's pokemon I let it.
Then in collosseum I found the last 10 levels of mount battle provided more experience so decided to use that.