In addition to a rating from Australia’s Classifications Board, PEGI the rating board for most of Europe, has Solarobo in their database. CyberConnect2’s only Nintendo DS game has a kid friendly rating in PAL territories.
So, if you’re looking to play Solarobo chances are you’ll be able to play it in English. Namco Bandai may not release it here, though. Fullmetal Alchemist Brotherhood, Go Go Cosmo Cops, and even one PS2 Naruto fighting game were some of their Europe-only releases.