Birdramon is Sora's Champion digimon companion.
Yokomon is the In-Training form and Biyomon is the Rookie form.
Sora has the crest of love and this allows her
digimon companion to evolve to Garudamon - the Ultimate level (the stage after
Birdramon is made with a toilet paper tube, a
printer, a piece of paper, some crayons, scissors and glue. I always prefer to use a
heavy paper (like construction paper), but it isn't necessary.