Nintendo has announced it will add two more GBA classics to the Nintendo Switch Online library, and if you're a fan of cutesy platformers and puzzlers, you're in for a treat.
Following on from the addition of other Game Boy Advance titles like Fire Emblem: The Sacred Stones to the service this year, the two games being added in this latest update are puzzler Mr. Driller 2 and platformer Klonoa: Empire of Dreams.
The former was originally released for the GBA in 2005 (in the US, at least), subsequently receiving a re-release for the Wii U in 2014. Like other Mr. Driller games, you'll need to dig through a series of differently-colored blocks to emerge victorious, and there are many blocks with different properties with which you'll need to contend.

Mr. Driller 2 began its life as an arcade game; it was a launch title for the GBA in Japan, but it didn't come to Western shores until a few years later, launching in Europe in 2004 and the USA in 2005.
Your second GBA game in this update is the underrated platformer Klonoa: Empire of Dreams, which, rather than being a spinoff of the main Klonoa series, serves more as a side story to the core games.
It plays very similarly to previous Klonoa titles, although since it's a Game Boy Advance game, you might not find it quite as impressive on the technical side as its bigger console brethren. Still, it's just as cute and endearing as the regular Klonoa games are.
You can check out a trailer that shows off both Mr. Driller 2 and Klonoa: Empire of Dreams right here.
Both of these GBA games are being added to the Nintendo Switch Online service on September 25th, but as usual when it comes to Game Boy Advance additions, you'll need the Expansion Pack addon to play them. Stay tuned for more.