[Kurona]

I'm not sure when each specific release came out, but I know the Legend Rider Henshin Belt series - which had started in 2004 - had continued through to 2004; so naturally some stuff must have been released during Decade, too. I'd take a stab and guess that the Den-O and Zeronos belts may have been released around Decade, since they can't have been released much earlier than that?

It's hard to really tell how much Bandai put into legacy toys though, because Decade was partly conceived as a filler line -- in case you haven't heard this before, the reason it has 31 episodes was specifically so that Kamen Rider shows (and toylines) could debut around September instead of February; this is so it wouldn't compete with Super Sentai toylines starting at the same time.