Laconic / Digimon Xros Wars: The Young Hunters Leaping Through Time

A basketball team with a history of multidimensional war take up hunting mons in a Dark World and eventually meet past heroes.
Unabridged version, super-evolve!

http://tvtropes.org/pmwiki/pmwiki.php/Laconic/DigimonXrosWarsTheYoungHuntersLeapingThroughTime