Still is the best Kirby game I've played, although Forgotten Land is a good candidate.

I mean, it has the Kirby charm, kickass cuteness and badassery, and mechas! I also find the concept of Kirby fighting capitalism so cute.
As for the gameplay, it's probably where the formula peaked. Star Allies kinda stagnated in being too easy in the main story and therefore a bit of a slog to get through, but Robobot manages to balance some good simplicity and difficulty. Also Mirror is back.

If you're asking why I'm ranking a Kirby game of all things a 4.5, then yeah I'm going to admit I'm biased because I love Kirby so much. But what is a review but not a thinking piece of one's own expression? Kirby is Kirby, and I'll always love Kirby, and Robobot reminds me of why I love Kirby.

O maior inimigo da repetição, simplesmente.

Esse jogo consegue se sair bem em tudo, sério. Os mapas são lindos e bem diferentes uns dos outros, os inimigos (tanto normais quanto os chefes) são únicos, as habilidades são tantas e bastante criativas, a lista continua...

Pra minha 1a experiência com Kirby, me surpreendi de verdade, nem sei se achei algum defeito enquanto jogava. É impossível não se divertir com esse jogo.

Very similar to Triple Deluxe in many aspects. The game is a lot of fun and fortunately without the gimmicky stuff that Triple Deluxe had.
The new gimmick, the mech, is pretty cool and I liked that it changes forms depending on the copy ability it scans. Feels great to play around with. Sadly, the devs only made it compatible with less than half of all the copy abilities in this game. I would have loved to see some more forms like Doctor or Hammer. I mean Doctor could have easily been based on a surgical robot.
Speaking of Doctor, I thought that was a pretty cool and versatile ability. ESP was interesting too although I found that it had a lacking moveset and Poison was a little boring in my opinion. I loved seeing Smash, Mirror and Jet back too.
The Mech + Jet and Mech + Wheel sections were some of the greatest sections in this game.

The stages were well designed and the industrial theme was great. I wasn't a big fan of the autoscroll levels though.
And I thought world 3, the water world, was one of the weakest.

The characters, Susie and President Haltmann were interesting and fun. They had some great moments.
Another great moment was the final sequence of events. When Kirby scanned the Halberd and became Kirby Halberd, that was awesome. I loved the music in that part too.
The whole soundtrack was pretty good actually, except for that fucking Canvas Curse music.

Some of those Rare Sticker locations were some real bullshit.
Fuck that enter the background shit. I always hated that in every Kirby game that it’s in.
Didn’t enjoy the sticker hunt much to get the last 2% for 100% completion but I did it.

Meta Knightmares is cool. If you play well you can keep up Meta-Quick the whole time which makes the gameplay very fast and fun. It made the autoscroll sections that more jarring though in this fast paced mode.
His moveset is alright too but I guess I liked playing as Dedede a little better in Triple Deluxe. I also miss the robobot sections.
In this mode, the bosses are upgraded but Meta Knight is so overpowered that I barely noticed the bosses being stronger.

Next up, we have 3D rumble. And that was the lamest shit ever. Extremely easy. Takes about 10 minutes to get through all three levels.
Team Kirby Clash was super easy too basically because I knew all the tricks from Super Kirby Clash on the Switch and since that game was based on this minigame, it is almost exactly the same.

Then we have the Arena and True Arena. The Arena was fine.
The True Arena was fine too right up to the final boss. Fuck Star Dream OS with its million phases and each of them has a huge HP pool too. Whoever thought that Star Dream OS shit was a good idea after going through all of the other bosses already should be shot in the face.

I am aware that I tend to throw around the phrase "peak fiction" a lot BUT I SWEAR TO CHRIST I REALLY MEAN IT THIS TIME. EVERYTHING ABOUT KIRBY PLANET ROBOBOT IS PEAK.

THE STORY IS PEAK
THE CHARACTERS ARE PEAK
THE LEVEL DESIGN IS PEAK
THE NEW GIMMICK IS PEAK
THE SOUNDTRACK IS PEAK
THE BOSS FIGHTS ARE PEAK
THE EXTRAS ARE PEAK
ITS ALL SO FUCKING PEAK

This is the greatest 2D Kirby game ever made and one of the greatest 2D platformers of all time. Thanks for all the memories old friend...