Kirby Star Allies is out this month and there’s currently a demo you can download on your Nintendo Switch which includes two levels for you to play through and two boss fights to encounter. Talking of bosses, the official Kirby Twitter account has revealed the returning Pon and Con bosses which Kirby and his team of friends will need to defeat to progress further in the game. Take a look at them below.
Here’s A Look At Pon And Con Bosses In Kirby Star Allies

Nice spoiler.
This could have been a pleasant surprise.
People don’t want to be spoiled.
I think they were already confirmed. I was on Kirby wiki recently and saw them in the character list.
So these ones were from Kirby Dream Land 3. I don’t remember them though I played the game since I have the Kirby Collection game from Wii.