Press 1 plus Up/Down while on the ground to avoid vertical attacks.
The Tekken 5 era includes several significant releases across different platforms: tekken-5-installments-tutorials
Roll backwards/forwards then press f+1+2 (forward + both punch buttons) to punish rush-down opponents. Tekken 5 | Tekken Wiki | Fandom Press 1 plus Up/Down while on the ground
Press b+3+4 (back + both kick buttons) for a quick recovery that deals minor damage. tekken-5-installments-tutorials