Time passes
Don't forget that at least one year has passed since Max tried out his skills at the Rustboro school. He might now be old enough to get his license, which is why he may be at Professor Oak's with his dad. Could it be that the mystery of Squirtle is about to be solved? I think that a Squirtle would suit Max well.
May is a capable battler but she has little or no formal experience (fighting Rockets does not classify as formal experience). Ash may be involved in training either she or Max in battling as his apprentice in the BF.
Regarding tag-teams, I think that Ash and Misty would be an awesome pair. Remember that they worked together for five seasons, so they probably know each other's moves really well and would be able to fit together very smoothly. May, for all her raw skill, is less experienced and Ash would find that he is spending most of his time protecting her Pokémon and supporting her rather than holding up his end of the battle.
Don't forget that at least one year has passed since Max tried out his skills at the Rustboro school. He might now be old enough to get his license, which is why he may be at Professor Oak's with his dad. Could it be that the mystery of Squirtle is about to be solved? I think that a Squirtle would suit Max well.
May is a capable battler but she has little or no formal experience (fighting Rockets does not classify as formal experience). Ash may be involved in training either she or Max in battling as his apprentice in the BF.
Regarding tag-teams, I think that Ash and Misty would be an awesome pair. Remember that they worked together for five seasons, so they probably know each other's moves really well and would be able to fit together very smoothly. May, for all her raw skill, is less experienced and Ash would find that he is spending most of his time protecting her Pokémon and supporting her rather than holding up his end of the battle.