But in MLPIT, he doesn't seem aware. Then again, he may not even realize he's in the past. (Sorry, I don't have a quote/source.) Which begs the question, given Baby Bowser's strong resemblance to Bowser Jr. (in MLPIT, anyway), why doesn't Bowser mistake his younger self for his son?
Yeah, that always bothered me. I'm inclined to think that Baby Bowser's character design
in PiT was just a mistake or something, and that Baby Bowser didn't actually look exactly like Bowser Jr. Otherwise, we'd pretty much have to presume that the present events of PiT took place before Bowser Jr. was born, and unless there was some kind of magic or accelerated growth or something (or Koopas have very different rates of aging than humans),
that would pretty much necessitate a gap of about a decade in between LM and SMS, which doesn't seem to be the case (although the fact that the "King Boo"
in SMS is not at all the same one as
in LM certainly helps things).