NO. IT. ISN'T.
I'm getting really sick and tired of this stupid "it's Digimon Frontier" crap that's going all over the internet.
If you'd take the time to check the two series, you would know that they're very different
CAPITAL. LETTERS. WITH. FULL. STOPS. MAKES. ME. THREATENING.
No, really, you made me laugh.
Anyways, I didn't say "it's Digimon Frontier", I said, "it's quite similar to Digimon Frontier", which it is:
-Both are series primarily revolving around kids taming monsters to fight other monster
-Both are established series as being partner and monster story
-BLAM! Suddenly there's this one where instead of having partners they BECOME the monsters and fight over monsters including over people who turn into the monsters.
Comparisons are inevitable and justified, because there are similarities in the basic context.
SO. I. WILL. CONTINUE. TO. MAKE. A. COMPARISON.
That's really fun, no wonder you do it!
The way I see Pokemon Reburst, it looks like trainers turning into Pokemon as Morphers.
No way! What made you think that??