Some of the EX era sets have different codes at the bottom-left for the non-holo Commons; Uncommons; and Energy cards. For Commons it’s usually three codes in English, German, French, Italian, Spanish, and Portuguese and four codes in Japanese. And for Uncommons and Energy cards it depends on the set, but it’s usually two different codes.
Some more info in these threads:
- Request Japanese ex series codes!
- Complete List of ex Era Serial Code Numbers
- Pokemon TCG ex Serial Codes - Google Sheets
Greetz,
Quuador