Plus, it brings its own die-rolling ability, so you always have a way to trigger it
They will always find their place in a limited format deck, because they correct the mana curve of the deck
Migratory Route The actual effect is a bit less powerful than Id like at 5 mana, but as always, Migratory Routes basic landcycling ability makes it hard to be upset about that
Pokemon Card Strategy: As far as strategy goes with this card I would suggest setting it up on my bench and when my opponent would bring out a Pokemon that has an extremely high attack I would switch Aggron in and use Return Blow, this move could potentially do 120 damage to the defending Pokemon and hopefully knock it out
Sources: TCGPlayer / Giratina, Ptcgradio / YouTube, TCGPlayer / Charizard, TCGPlayer / Aerodactyl, TCGPlayer / Umbreon, TCGPlayer / Rayquaza, TCGPlayer / Pikachu