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That Won't Work (おっかねえよー) is an energy wave attack used by Chi-Chi as a child.


First, Chi-Chi places her index and middle fingers of both hands on the forehead circle of her helmet, where she charges green energy. Then, she shouts "I'll burn you to a crisp!" and fires the green energy from her helmet in the form of a laser beam. The laser beam scans from left to right at her opponent, inflicting a great amount of damage.


Chi-Chi about to use her laser beam on Yamcha again

Chi-Chi uses this attack to destroy the remains of a T-Rex that was chasing her after she decapitated the large reptile with her helmet blade. When Yamcha appears to congratulate her, Chi-Chi attempts to attack him with the "That Won't Work" helmet laser beam, but Yamcha dodges the beam at the last second and punches Chi-Chi to the ground, knocking her out.

Appearances in Video Games

"That Won't Work" was named in Dragon Ball Z: Budokai Tenkaichi 3, where it is one of Kid Chi-Chi's Blast 2 attacks.


  • Like her Stay Away From Me! technique, this technique is an homage to the Emerium Beam, one of the signature attacks of the Japanese tokusatsu hero Ultra Seven from the Ultraman franchise.


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