Hey, remember when I said I only had two more Planet Armors to collect? Yeah, that was a mistake.
Remember Gundam Build Metaverse? That short, useless waste of time from last year? It featured cameos from all the protagonists of all the old Gundam Build shows, which of course includes Hiroto.
And since everyone in the show got a new mobile suit, that meant they had to come up with a new Planet Armor. Thus Bandai had no choice but to temporarily reinstate Pluto as a planet so that they could create the Plutine Gundam:
Somehow I completely, utterly forgot that this thing existed until I saw it in the store one day. I don’t really have a good excuse either - I even wrote about the thing earlier this year. I offer my most humble apologies.