Why did I get a Gigantamax Machamp in my Shield game?

I got a 3-star Gigantamax Machamp in my Pokemon Shield save file, and I know that it only appears on Pokemon Sword. Help me understand this rare event (you could say glitch) by giving me answers!

Pleaselog inorregisterto add a comment.

You probably just joined in a Sword raid. If you play on Shield, you can still join in Sword raids. After you caught it, you were probably wondering where it came from and you just realized you can’t get in Shield. Just that or it was traded to you. Hope this helped.

From what I can understand, Gigantamax Machamp and Gengar aren’t entirely exclusive to specific games. According to Bulbapedia, innormal gameplayGMax Machamp and Gengar are exclusive to Sword and Shield, respectively.

However, these GMax forms have been made available to BOTH games throughWild Area News.Additionally, through the purchase of an expansion pass, Gengar and Machamp can be made available to both games.

(sorry if this isn’t good, it’s my first answer)

It’s not a glitch, there was an event where gmax Pokemon that were exclusive to Sword were available in Shield and vice versa.