sentences:  As the characters go up in levels, one may send his or her improved characters to the N64 version to level up again.A variety of tennis courts become available to unlock in the Nintendo 64 version after linking with the Game Boy Color version.On the Virtual Console versions, the Ring Tournament mode in Special Games in the N64 version cannot be highlighted and the ability to unlock extra characters and courts through the Transfer Pak in the GBC and N64 versions has been removed, and Linked Play, erase N64 data, N64 Tennis data and N64 Tournaments in the GBC version cannot be selected.