Sanrio Timenet: Mirai-hen (1%)

サンリオタイムネット 未来編

A 1998 Game Boy Color monster-collecting RPG similar to Pokémon with creatures designed by Sanrio the company behind Hello Kiddie and Friends. Exclusively released in Japan the "Future Arc" version alongside the "Past Arc" version, Kako-hen (過去編). The pillar of time has been broken, splitting the world into “past” and “future,” and you the player have to travel through time to collect the fragments to fix it and restore the timeline.

In Mirai-hen specifically, the adventure begins from the “future side,” with version differences including which monsters you can encounter intended to encourage trading/collecting across both releases.

Sources: https://wikiwiki.jp/sanriotime/%E6%9C%AA%E6%9D%A5%E7%B7%A8 ,

https://wikiwiki.jp/sanriotime/