select p.name as 'Pokemon Name',t.trainername as 'Trainer Name', pt.pokelevel as 'Level', p.primary_type as 'Primary Type', p.secondary_type as 'Secondary Type'
from pokemon_trainer pt
join trainers t
    on pt.trainerID = t.trainerID
join pokemons p
    on p.id = pt.pokemon_id

Ace Duo Elina and Sean are the strongest trainers because they have a couple of very high-leveled pokemons