small update: I could not get a repair or replacement from the store I bought it from, it's been more than their 12 month warranty period, so I followed this to see if I can fix my cart myself...
Quite a few random issues I have with the Junior:
1. GBC games do not load at all, white-screen
2. GB games work normaly
3. Pokemon Yellow
- experiences tiny graphical glitches in sprites (a few pixels in the enemy pokemon (always the exact same)...