This patch will unlock everything in the game from the start, without use of a save file. This is based on work performed by freem, detailed in this post. The patches were created by C-Drive.
WWF No Mercy [NTSC-U v1.0]
Pre-Patch Checksums & Hashes:
CRC32: B33F44F0
MD5: 04C492BE7F89FC6F425238BD67629544
SHA1: 3566D9B5723291937582453AD0453CE517CFC358
Post-Patch Checksums & Hashes:
CRC32: AEB52284
MD5: 2FA24F14FCEFB81C29F216D07f658D74
SHA1: 1b18f17956f445f848a3f51d5c9aa545f002a24a
WWF No Mercy [NTSC-U v1.1]
Pre-Patch Checksums & Hashes:
CRC32: BACEEA13
MD5: 66B8EC24557A50514A814F15429BD559
SHA1: 91CEE3D096F4A76644D8B35B9AEAD6448909ABD1
Post-Patch Checksums & Hashes:
CRC32: EA2641EC
MD5: 13BA768134785F4ED1075A27928B29B4
SHA1: 1172a418603f4083b7666fe7fc87b6119ad550d9