If Huepow brought Klonoa into his reality, why can't he do it again?
He can't because Klonoa was only brought there to restore the balance of dreams, plus The Song of Rebirth would erase Klonoa from that world again. He doesn't belong there.
If Huepow created all of Klonoa's memories, doesn't that means that Klonoa's friendship was fake all along? He literally made Klonoa believe they were great friends, after all.
That's the point. Huepow filled Klonoa's mind with memories, but ended up Becoming the Mask while spending time with him. Why else would he have been torn up while confessing to Klonoa?
I'm personally more concerned with Klonoa's OTHER supposed relationships. Did he not actually have a close relationship with Grandpa? Was Grandpa in on it? Did Grandpa even exist? What about the fact that all the people from that same area looked to be the same species as Klonoa? Was that all made up, or do the same species just happen to live there too? Really the only two answers are either that everyone Klonoa thought he knew were in on some grand conspiracy, or they didn't even exist.
Well, Grandpa died as a result of the plot, so he had to have been pretty dedicated to whatever cause he would have belonged to. Either that, or they just weren't expecting Joka to go so far as to kill someone. It does seem a little odd, though, especially considering that Huepow still wanted Klonoa to finish his duty, even though he knew exactly how big of a toll that it was taking on the guy. Perhaps, if everyone in Phantomile was in on some sort of plan, no one really realized how nice of a person Klonoa actually was, and just how much his life sucked in retrospect, until the very end, after everything had been said and done and they had all gotten to know him. But in spite of all that, they still had to let Klonoa be taken out of Phantomile for it to be saved. So, though the "plan" would have worked and everyone would have wanted Klonoa back in Phantomile, doing such a thing would ruin everything they worked for... or maybe you're right, and everything was just a dream, or something.
I know that this sounds petty compared to the other Headscratchers here, but what is that curly thing on Joka's back? It can't be a tail, because he already has one, just below the curly thing, and I don't think it's a second tail, because it never moves. Could it be hair? He is a Walking Head, after all.
If Phantomile is not Klonoa's home, why do all the residents of the wind village resemble his species? Did there just so happen to be another population of Klonoa's species in that world when it needed Klonoa? Is Huepow or someone else casting some sort of illusion that causes Klonoa to see the residents of the wind village as his own species so he doesn't ask questions?
Klonoa 2: Lunatea's Veil
There's the part where you have to shut down the 2 generators of Volk. You have the choice of going to the one in Volk City or the Underground Factory first. If you choose to do Underground Factory first it's straight back to Volk Hall with the fight with the guard bot where after the fight Leorina shows up and reveals the rectors were decoys and the real one is ready to blow in the city. Sounds simple? Well no: If you choose Volk City's reactor first you are then required to do Underground Factory next and then it's Volk Hall's boss. The outcome is the exact same. HOW!? The reactor thats about blow in Volk City is the exact same one in the city if you chose to shut off first. How did it suddenly turn on again? Also how could both reactors be decoys if one is the exact same in the exact same place that you shut off? Why didn't the developers just make it so you have to go to Underground Factory first? Then the whole decoy thing would make 10x more sense!
In the first game, it's explicitly stated in the end that Klonoa cannot stay in Phantomile because of the Song of Rebirth, but there's no such thing in this game. And no one seemed to have the slightest problem with having him around. Which is to say, Klonoa could have stayed in Lunatea and finally had a real life, with friends and no repercussions whatsoever... So why didn't he? Geez, when is that third installment gonna happen?
In the final cutscene, Lolo alludes to why, when she says that "this isn't your home, is it?" It's implied that Klonoa does in fact live somewhere, and yet he's forced to travel between worlds, and leave them despite any connections he may have made. Also if you consider the perspective of "Klonoa as the player character" then it makes sense that despite staying would lead to a happy ending, you have to close the game eventually. Sorta like what Undertale muses on, really.
Klonoa Heroes: The Legendary Star Medal
Janga poisoning Klonoa during the cutscene following the former's boss fight is treated as a dramatic plot point, as Guntz and Pango spend the following level trying to get Klonoa to the Lunar Base's medical wing to get him an antidote. Yet Janga is also able to poison Klonoa during the boss fight as well, and that can be cured using vegetable juice or an inn (or prevented altogether using a Claire Crystal), like with other poisons in the game. Gameplay and Story Segregation and Plotline Death aside, why didn't Guntz and Pango consider using any of the aforementioned healing methods on Klonoa before trying to take him to the medical wing?