When wizardmon at sky city will ask you to use his wand, say yes and type the words:

A-VEEDRAMON --to get a ayroveedramon
H-KBUTERIMON --to get herculeskabuterimon
PIEDMON--for piedmon
JIJIMON--for jijimon
WARGREYMON--to get wargreymon
OMNIMON-1--for omnimon I
OMNIMON-2--for omnimon II