Top mods / Cobblemon: Mega Showdown
Not listed
Cobblemon: Mega Showdown doesn't list Minecraft 26.3 on Modrinth. The newest release it lists is 1.21.1, on Fabric, NeoForge.
Open Cobblemon: Mega Showdown on Modrinth
This is what the mod's author listed on Modrinth, not a test. A listing doesn't prove a mod runs on your setup, and a missing listing doesn't prove it fails. Versions must match exactly, and files published elsewhere, such as CurseForge, aren't counted.