nope they stay the same lvl, hope this helps =)
On seven island in sevault canyon there is a spot where 4 trainers are and if you stand in a specific spot you can rematch all 4 trainers each have high level 50 Pokemon making it easy for your Pokemon to level up then when there weak go south and into the house talk to the man and say yes your Pokemon will be healed then go back and repeat or battle the two trainers outside of the house each have 6 Pokemon all ranging in the level 50 range.
Use the VS Seeker near the Hot springs in one island. There are several trainers there.
you train your Pokemon or get DS action replay
Use the VS Seeker to your advantage and train wherever the Pokemon's trainers levels are the highest, before the E4 the best place is Island 1 (Approx 37 with some evolved Pokemon), since you cannot use the VS Seeker in Mountains.
i think at level 32
I migrated my whole party from firered to pearl, and had to train my new party to level forty, so I used the vs. seeker on the bikers on cycling road and on the trainers outside of Fuchisa city.
On seven island in sevault canyon there is a spot where 4 trainers are and if you stand in a specific spot you can rematch all 4 trainers each have high level 50 Pokemon making it easy for your Pokemon to level up then when there weak go south and into the house talk to the man and say yes your Pokemon will be healed then go back and repeat or battle the two trainers outside of the house each have 6 Pokemon all ranging in the level 50 range.
Lague r vs seeker strong trainers vs seeker plus league plus rival = lot exp
Victory Road or Past Trainers Using the VS Seeker
Use the VS Seeker near the Hot springs in one island. There are several trainers there.
You need the vs seeker because you can't rematch trainers without it you would have to constantly beat the elite four to train your Pokemon. Have your Pokemon hold a lucky egg while training it.
The best way is to use the VS Seeker (in Vermillion's Pokecentre someone will give you it) to battle trainers you have previously.
you train your Pokemon or get DS action replay
actually for some reson it does bring lv. up on some trainers and if it dosent bring lv. up then etheir train them on low lv. Pokemon or wild Pokemon
Pupitar evolves into Tyranitar, starting at level 55. I recommend training Pupitar against Victory Road Pokemon or using the Vs. Seeker to re-battle trainers for extra EXP.
Dratini evolves at level 30 into Dragonair in Pokemon FireRed. It then evolves into Dragonite at level 55.
Use the VS Seeker to your advantage and train wherever the Pokemon's trainers levels are the highest, before the E4 the best place is Island 1 (Approx 37 with some evolved Pokemon), since you cannot use the VS Seeker in Mountains.