But it's still only one creature, so if it's destroyed, there's one trigger for a creature dying, even though multiple creature cards will enter the graveyard from the battlefield
Cosmetic elements Name, subtype, as well as set/number, language and collector info are all mostly cosmetic elements or determined by outside factors, with little influence on the rest of the card
As with Mew, theres a cheaper lookalike: the alternate shiny Charizard #331 sells for roughly $18, a fraction of the #349 price
In the case of non-Japan residents being unable to buy the cards, that might be by design
Its pretty close to having Splinter Twin in the Command Zone
The second benefit does apply more specifically to Planeswalkers, but having loyalty abilities cost +1 loyalty extra is something a lot of unaware players might trip over, thanks to it being framed more like a negative