Many people wonder if Hollow Knight will be ported to the Playstation Vita.
Unfortunately, it seems highly unlikely that Hollow Knight will ever be brought to the Vita. Team Cherry is busy working on Hollow Knight Silksong, and additionally Playstation Vita is an obsolete gaming device at this point.
A Vita port was actually a stretch goal in the Kickstarter campaign by Team Cherry when they were raising money to make Hollow Knight. Unfortunately, the goal was not reached, and at this point it simply doesn’t make sense for the team to work on it.
That said, some folks have shown early or hacked builds running on a Vita.