Holy crap. I mean, it is possible that he's actually dead, but I'd like to hope otherwise. One of those times he was gone, somebody went to the trouble of organizing some Mates to go search for him, and he literally just dropped in and laughed at everyone. I suspect he's on the moon trolling us.
On a more unrelated note, when you said “Did your save file get corrupted or something?”, it reminded me of the one time I was playing Megaman : Battle Network on an emulator, and then my device decided that I couldn’t use the emulator anymore and I had to redownload it and start everything over again. Do you know how frustrating the network can be in the game? Sometimes it feels like a never ending maze. I had to go through the whole game again. And I also had to start any other games I was playing on that emulator again.