In Generation V, Sawsbuck changes its appearance depending on the current season. However, this change in form does not occur after capture, unless it is present in the player's party at the time of a season change. This applies to Eggs as well.
When the month is January, May, or September, the season is Spring, and it becomes Spring Form.
When the month is February, June, or October, the season is Summer, and it becomes Summer Form.
When the month is March, July, or November, the season is Autumn, and it becomes Autumn Form.
When the month is April, August, or December, the season is Winter, and it becomes Winter Form.
From Generation VI to VIII, seasons are not a mechanic, and only the Spring Form is obtainable in the wild. However, its other forms are retained upon transfer from Generation V and can be passed down via breeding. In Pokémon Scarlet and Violet, Sawsbuck's ability to change forms returns, and is done through the same method as in Black, White, Black 2, and White 2, however the form it will become is now based on the location that the game is loaded in.
Sawsbuck is a brown and cream, deer-like Pokémon with rhomboid ears and darker ear insides. Its eyes have light-orange markings that curve down to the sides of its face. It has a dark-brown nose, and it sports cream fur on its chin and sides of its face. Light-orange stripes rim its underbelly, and its back is decorated with spots corresponding to the season: pink in spring, green in summer, orange in fall, and white in winter. Its limbs are slender and tipped with hooves. Unless it's summer, its brown tail points down.
Its appearance changes depending on the season. During the spring, a tuft of cream fur appears on its chest, and its antlers are adorned with pink flowers. During the summer, its tail points up, it grows tufts of fur on the back of its head, and its antlers sport green leaves. During the fall, it sports a cream tuft of fur on its chest, and the leaves on its antlers are red and brown. During the winter, the cream fur turns white, tufts of white fur appear on its chest and lower limbs, and its antlers are coated in white.
Sawsbuck lives in herds led by the Sawsbuck with the most splendid antlers. It can live almost anywhere as they adapt to the season but prefer to live away from humans. It is herbivorous. Sawsbuck have been referred to as the harbingers of spring. There are many enthusiasts out there who love the different forms of Sawsbuck. However, the Winter Form is the least popular of them all.
The flowers on Spring Form's antlers grow slower due to it absorbing nutrients. The paler the Spring Form flower is, the more beautiful Sawsbuck apparently becomes. The thicker and larger the broach leaves are, the more majestic Summer Form Sawsbuck becomes. Summer Form's leaves can be used to make black tea, which has a different taste depending on the region. In Paldea, the tea has a more aromatic taste. The darker the Autumn Form's red foliage is, the more stylish it is considered. Autumn Form Sawsbuck have short tempers, and the males notably fight each other incessantly. Winter Form Sawsbuck are calmer and easier to tame during the winter. Hence, it is considered the perfect time to obtain Winter Form Sawsbuck as a partner.
All four forms of Sawsbuck appeared in The Four Seasons of Sawsbuck!, with Sawsbuck's Winter Form making its debut, and Sawsbuck's Summer and Autumn Forms making their main series debut. They resided at a secret lake that allowed the Sawsbuck to take on all four forms at the same time. Robert's aim was to photograph all four forms together, which he was able to do.
Multiple Summer Form Sawsbuck appeared in the opening sequences and ending credits of both White—Victini and Zekrom and Black—Victini and Reshiram, while Autumn Form Sawsbuck exclusively appeared in the opening sequence of Black—Victini and Reshiram. This also marked the debuts of both the Summer Form and Autumn Form Sawsbuck.
Sawsbuck may be based on a Père David's deer, which is a species of deer that decorates its antlers with foliage during the breeding season. Its antlers may also be based on a deciduous tree. It may also be based on one of the stories of Baron Munchausen, in which he tries to shoot a stag using cherry pits in his musket. The stag survives and escapes, and the next year he discovers a stag with a cherry tree growing out of its head.
Sawsbuck may be a play on sawbuck (framework for holding wood to be sawn), which contains the word buck (male deer). SAWS may also be an acronym for the names of the seasons (summer, autumn, winter, and spring).
Mebukijika may be a combination of 芽吹き mebuki (to bud) and 鹿 shika (deer).