Probably yeah. Also, in Den-O & Kiva: Climax Deka, Kiva's Chinese name was called "魔牙", but TVB named him "月騎".
Well, it could be 奪卡王 or 十年. I would name Decade as 迪崎 for the pronouncation.
Well Kuuga in Kanji was 空我, as in Chinese pronouncation name as 古迦.
Yeah, you're right about that. I think if Double's name maybe 打保路 or just use W and OOO can be 歐斯.