Back to the debate, BFR will not work against magalor and his ship thanks to the hability to open portals to "another dimension" including BRB BFR thanks to teleportation and blackholes
I doubt X would use existence erasure sinse It's so out of character, and Magalor and his ship can scape four transmutation before It's complete
So the only hax that really still can be used is Four screaching, trough he would only use later in the fight sinse he stoped using It after the split
In skill Magalor and ship takes advantage sinse both fought the 4 heroes of dream land on even terms as Four really only fough people weaker them him overall and X... isn't a fighter him self
In resistence skill It's kinda dificult, Maglor ship will be the first one to be taken down completly here sinseIt's the only with no regeneration or hability to come back from death, As long one is alive Four and X can ressurect one another and Four has that amazing regeneration beingh able to come back from beingh in a liquid form, but magalor after taking enough damage will become "Magalor soul" with mid high regeneration letting him come back from becoming some kind of mist during his transformation and with unlimited stamina there is a real chance of him making Four and X to tired to keep fighting or resurect one another(sinse while X was training ressurection looked like something that tired him a bit)
I would say four could counter It with transmutation but as I stated prior, sinse Four transmutation don't change the target biology the egg should be able to come back from back from It, the definition of "mid-High" regen say that he can still come back even if he is completly Biologically destroyed
Mid-High: The ability to regenerate from having all biology completely incinerated. This includes being reduced to ash, dust, smoke, vapor, or plasma.
But Magalor has a weakness, his crow, If It's destroyed he will go back to his egg form and really tired, the problem now is, how will four and X break It?
Not only they don't know It's his source of power(unless he start monologuing) but also would need to go trough magalor star shield that only break with the use of super copy habilities that scales a lot higher them kirby's normal AP sinse not only normal atacks don't damage that shield but also reflect's them, Four and X best option here would be Giant Four sinse his AP giant is higher them his normal, but It's not in character for Four to change size against a non big oponent... and magalor should be smaller them the 2 of them alread
The only win condition(that is in character) Four and X have is break magalor crown before he uses his shield(what thankfully he only uses whem taken some damage alread) beacuse or they just can't damage him realible now thanks to the start shield or he becomes magalor soul and regenerates from everything Four and X trow at the guy with atacks that sould be in pair with super copy habilities
Voting magalor and ship here, Four and X have what takes to win but in character would go little to thouse ways and don't know about breaking Magalor crown to reliable break It before they run out of stamina
Resume: Voting for Egg and his Flying pan