The best replacement for baby mario is baby bowser.

The best alternatives to baby mario are rated as following:
★★★★★  baby bowser
★★★★★  baby luigi
★★★★  baby sonic
★  donkey kong
★  baby peach
  baby browser

Your alternative for baby mario is not listed? Suggest!
Speaking about baby mario, one probably shouldn't forget about yoshi.

Other search terms related to baby mario and their ratings are:
★★★★★ yoshi
You have in mind a companion for baby mario and it is not yet here? Propose!



Google Trends

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baby mario
baby bowser
baby luigi