???
Thats a totally normal 3-in-1-cartridge. Whats special about it? It was NOT only released in spain. There are thousands existing in Germany...
For example:
http://www.ebay.de/itm/Nes-Spiel-3in...item35d8f12673
http://www.ebay.de/itm/Nintendo-ES-N...item19f0babf0c
http://www.ebay.de/itm/Nes-Spiel-3in...item35d8f12824
It's not worth anything at all... It was given with the NES console in Europe so I don't see anything special about it.