>>55029423In the grandpa’s story of Ogerpon and the Loyal Three, a hidden fourth Pokemon is present among the three which resembles a peach (representing Momotaro which is what the Loyal Three are based on). The peach can also be seen in the shop with interactable text
It was also datamined in Teal Mask that a codename called ‘dokutaro’ (momotaro + doku (jp for poison) has in battle text which is where that name comes from. It’s actual name is likely Peachikeen since it’s the leader of the Loyal Three which are named after positive phrases