I've played all the Metal Slug games over the years but I'm having a hard time remembering which one these images are from. I've tried image searching, but there are literally 6 billion Metal Slug images online to sift through.
And for what's going on: Cartoonsmart.com is a cool site that sells video tutorials for Flash and iOS, etc and sometimes they partner with people and sell someone else's tutorials on their site. Today I got an email about this new starter kit they were selling for iOS. I didn't see the sprites until part of the video shows the full sprite sheet and I was like wait... that's Metal Slug. I figured whoever made the starter kit just threw those in for teaching purposes. They still shouldn't be selling them included in a starter kit though... but then I decided to look up Commander Cool on the App store and sure enough the game features a lot of sprites lifted directly from Metal Slug series.
You can see the sprites I'm trying to figure out here:
I wanted to know what specific game so I can email the Cartoon Smart guy and let him know he might want to not do business with these guys as he is in effect re-selling copyright infringing material.
The guys that made the game over at http://commander-cool.com/ios-2d-platformer-starter-kit.html have this to say on their Starter Kit page
You are free to use all source code contained in the ‘CommanderCool‘ folder for your own private and/or commercial use, however, artwork, music tracks, fonts and sound effects included in this package will remain the copyright Janzen & Strauß.
At least one of the people that rated the game on the App Store called them out.