Sgt. Frog (Khmer: ពលបាលត្រីកង្កែប Polbalotrei kangkeb) is an unauthorized Cambodian port of Keroro Gunso: MeroMero Battle Royale Z. The developer is not credited anywhere in the game, but it's assumed it was developed by Prum Meas Interactive, the game counterpart of Prum Meas Production.
There is a cheat code that lets you choose a level, follow these steps to do this: "1. Press C (pause). 2. Press A button 25 times. 3. Press Up button 25 times. 4. Press Down button 25 times. 5. Press Right button 25 times." (It's okay if you do mistakes, press the wrong button, or press the button more than 25 times, at least you need to pause game and press it 25 times, but the most important thing is NOT TO BREAK SEQUENCE.) After this you will see a black screen with text saying: "អេក្រង់កូដ. ប្រសិនបើអ្នកកំពុងអាននេះអ្នកនឹងក្លាយជាអ្នកលួចបន្លំឬអ្នកអភិវឌ្ឍន៍ដ៏អស្ចារ្យបំផុតនៃហ្គេមនេះ។ សូមជ្រើសរើសជុំដែលជាជីវិតរមែងស្លាប់! (Transliteration: Ekrang kaud. Brasenbae anak kampoung an nih anak nung klaycha anakluochabanlom ryy anak aphivodtho da aschary bamphot nei hkem nih. Saum chreusareusa choum del chea chivit rmeng slab!, English Translation: Code screen. If you are reading this, you will be the greatest scam or developer of this game. Please choose the round of mortality!), and you can choose level from 1 to 16 with Up and Down buttons.