Doraemon segment from "Sega Shinsaku Soft Video Vol. 28"

Source: SEGA 新作ソフトビデオ VOL 28 (wadelyjp)
https://www.youtube.com/watch?v=zHL8K45k6K4

In another instance of "WTF is this audio doing here?", I'm hearing Konami's Gradius in a Doraemon game.

Gradius never had a Game Gear/SMS port to my prior knowledge.

Thanks for watching! As with all YouTube channels, likes, subscriptions and comments are welcome - but I presume that is to be expected, yes?

If you want to show your support in other ways, feel free to use StreamLabs!
https://streamlabs.com/kiddocabbusses/tip

Merch:
https://www.youtube.com/channel/UCOXvfoAZZJhmDZw0boGkSYA/store

Twitter:
http://twitter.com/cabbusses

Twitch:
http://twitch.tv/kiddocabbusses