Gengar Pokédex: stats, moves, evolution & locations
Pokémon evolution charts - Pokémon Database
Haunter Pokédex: stats, moves, evolution & locations
Aegislash Pokédex: stats, moves, evolution & locations
Gengar - Generation 4 learnset - Pokémon Database
Can Gengar evolve without trading? - PokéBase Pokémon Answers
Gligar Pokédex: stats, moves, evolution & locations
Gengar - Generation 7 learnset - Pokémon Database
Greninja Pokédex: stats, moves, evolution & locations
Lucario Pokédex: stats, moves, evolution & locations