There certainly won't be any mods added due to the fact that new players would need it to join the server.
HOWEVER, pixelmon is adding some more ways to have a bigger inventory, such as being able to use all ball variations from a shulker and having a bag for normal other bag items (not yet finished but will be implemented soon).
HOWEVER, pixelmon is adding some more ways to have a bigger inventory, such as being able to use all ball variations from a shulker and having a bag for normal other bag items (not yet finished but will be implemented soon).