Pokemon Crush is a hack made from Pokemon Ruby and it is in Spanish, not English. The author, RedMort, is a Spanish himself (maybe this is the most reasonable excuse for the language of this game).
Pokemon Team Rocket Jessie & James Edition is a special Pokemon Fire Red Hack and unlike any other hacks that you have played. But one disadvantage of it is using Spanish.
Pokemon Nemesis is a good Pokemon game that I want to present to you today. The main language in the game is Spanish.
Pokemon Keyra is an excellent Pokemon Hack with new and special features. Eing15 uses Pokemon Ruby Codebase and decides to make a Spanish Pokemon Game Version.
Pokemon Heroes is made in order to continue Nosman’s Pokemon Hack project that was stopped. It is based on Pokemon Ruby and in Spanish.
Pokemon Darkblue is another Pokemon ROM Hack from the creator Lex. It is based on Pokemon Ruby (U).
Pokemon Mitic Island is an awesome Pokemon Hack with many great features but one disadvantage of it is using Spanish.
Pokemon Shiny Gold is one of the popular Pokemon Hacks that is based on Pokemon FireRed English.