Anime series help

[fuzz123]

okay so years and years ago,
maybe 8 or so back,
i watched what i thought was a series on t.v
i believe it was on nickelodian
anyway
ive searched for it everywhere but i just cant seem to find it
i believe it was a digimon series, but everything i search comes up blank

what i remember of the series was that the users could turn into their digimon, or something along those lines
and at the end of the series or movie, there was this big boss fight, and i remember there being this HUGE sphere where the end battle took place in...
none of it was set in the digi world, all in the real world

ive been looking for a year now so someone help

[Homunuculus]

Maybe Soul Eater?Or

[OtakuInu!!!]

I get what you're talking about. I vaguely remember it though. Sorry.

I agree it is Digimon. Maybe try Digimon Tamers?