This weekend i found this cartridge:

 It is named
 "HITS-2001 12 en 1" the preposition, at first sight makes you think is in spanish, you can see in the damaged sticker clearly 
"poke´mon oro" written on it.
Inside we can observe the following games:

- Pokémon Oro (Spanish)
 - Lamborghini (English)
 - WWF Superstars (English)
 - Shadow Warrior (English)
 - Tom & Jerry (English)
 - Track & Field (English)
 - Smufs (English)
 - Mario & Yoshi (English)
 - Snoopy (English)
 - Dr. Mario (English)
 - Tetris  (English)
 
All the games look to be dumped from the original titles, but the 
Pokémon oro is other history:
This Pokémon, in the gamefreak splashscreen, the Gamefreak logo was untouched, but the name of Gamefreak was changed by 
"GB Translations PRESENTA"
I searched in the net for a group of translators or fansub doing this job, but i don´t find anything.
The main title screen, is the japanese version in kanji, 

 but the rest of the game is translated. I don´t played to it more than five minutes.

(EDIT: included new pictures.) 
Ok, i find differences in another game: Shadow Warriors, the splashscreen is different, the rest of the game is normal. 
