Dragon Ball Z Budokai HD Collection is Namco Bandai’s first HD port and they chose Pyramid to handle it. Pyramid made the quirky music game Patapon and ported Dragon Ball Z Budokai from PlayStation 2 to Gamecube.
Pyramid also Busou Shinki: Battle Masters and brought The Legend of Heroes: Trails of Zero to Vita. Unless you count the shader programming Pyramid did for El Shaddai, Dragon Ball Z Budokai HD Collection is their first HD title.
Thanks for the tip Roberto!