Beast Boy in LEGO Batman 2: Not Playable

Beast Boy is NOT in LEGO Batman 2: DC Super Heroes.

Teen Titans in LEGO Batman Games

• LEGO Batman 2 (2012): No Teen Titans characters playable. Roster: Batman, Robin, Superman, Wonder Woman, Green Lantern, Flash, Cyborg, Martian Manhunter, Hawkman, Hawkgirl, Zatanna, plus villains.
• LEGO Batman 3: Beyond Gotham (2014): Adds Beast Boy, Raven, Starfire, Blue Beetle as playable Teen Titans (via DLC or unlock).

How to Play as Beast Boy in LEGO Games

• LEGO Batman 3: Purchase "The Squad" DLC pack or unlock in-game.
• LEGO DC Super-Villains (2018): Beast Boy playable in main roster.
• LEGO Marvel Super Heroes 2: No (Marvel only).

If You're Playing LEGO Batman 2

Closest "green shapeshifter" feel: Plastic Man (DLC in LEGO Batman 3) or Mister Fantastic (LEGO Marvel). But neither in LB2.

Upgrade to LEGO Batman 3 or LEGO DC Super-Villains for Beast Boy!