Its not bugged, the guide just not updated yet
Gokuwmon
Evolves From:
• Angemon - 5000 Beast Xp
• Leomon - 5000 Holy Xp
• Meicoomon - 5000 Beast Xp
• Wizardmon - 5000 Beast Xp
Evolves To:
• BanchoLeomon - Lv 75
• Goddramon - 50000 Dragon Xp
• Cherubimon (Good) - 50000 Beast Xp
• Crusadermon - 50000 Machine Xp
• Venusmon - 50000 Holy Xp