Tekken Tag Tournament 2 on PS Vita? No – PS3/360/Arcade/PS4 BC Only

Tekken Tag Tournament 2 was NOT released on PS Vita.

• Platforms: Arcade (2011), PS3, Xbox 360 (2012), Wii U (2013 – "Unlimited"), PS4 (via PS3 BC streaming? No, Not on PS4 natively. PS Now streaming only).
• PS Vita Fighting Games: Tekken 3D Prime Edition (3DS), Street Fighter x Tekken (Vita), Ultimate Marvel vs Capcom 3 (Vita), Persona 4 Arena Ultimax (Vita), BlazBlue (Vita).

If you want Tag 2 portable: Wii U (Unlimited) + Wii U GamePad (Off-TV Play) is only portable-ish official way. Or Steam Deck / AYN Odin / Retroid Pocket running PCSX3 / RPCS3 (TTT2 PS3) – Heavy emulation, high specs needed.