Uses Japanese needles 3 and 5. The yardage requirement doesn’t include the carry-along threads.

The two sweaters are identical except for colorway.
Yarn requirements:
Puppy Ai:

Sweater #7

280 g Natural (12)
45 g Saxe blue (14)
40 g Navy blue (23)

Sweater #8

Puppy Ai:
280 g Dark blue (17)
45 g Light blue (25)
40 g Natural (12)

For both sweaters (these are probably optional):
Carry-along threads:
Puppy Créer (クレエ) 100% silk thread, no yardage information but No. 7 is 337m per 25 g. It looks a lot like the flat Kreinik metallic thread.
75 g No.10 in Natural (color #2)

Puppy Bright No.7 (ブライト) 100% rayon, 200m per 20 g, recommended needle size is Japanese 3.
30 g Silver Lame (9006) (銀ラメ糸)