On sites like - https://gamehacking.org / incorrect addresses are specified on the Ninja Debug menu for the release EU and JP versions of the games.
Here are the correct addresses:
0010E840 00000001 - Maken X v1.000 (EU)
0010C5F4 00000001 - Maken X v1.004 (JP)
Maken X [Dreamcast] Ninja Debug menu (EU_JP)
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