All 1025 Pokémon shown as their silhouette next to their name and Pokédex number, grouped by generation — find the shape you are looking at, then open its entry or see where to catch it.
Mega forms change a Pokémon's shape, so their silhouettes differ from the base forms above; they are not part of this set yet. Terastallized Pokémon keep the species silhouette.