The Nosy Bat

The Nosy Bat is a character in the Depression Realm that is alluded to in some of Phuny's notes, where the hyena complains about the bat "always rebuilding the bridge he destroys".

How To Find The Bat
The Nosy Bat appears in Bipolar Woods after Phuny destroys the bridge and before Lenin repairs it, and the method to find him is simple yet devious - simply interact with the bridge parts hidden in the same area, but do not pick them up (pick the option to leave them where they are both times).

After you have interacted with both bridge parts like this, the Bat will swoop in, commenting on Lenin's indecisiveness, advising him and offering to fix the bridge for Lenin or letting him do it himself.

As an aside, if you choose to fix the bridge yourself, the Bat will also advise Lenin to be careful with "happy people" (in yellow, signaling that yes, this is important)