Akamaru is injured by a rival shinobi from another nation. The shinobi used a battle skill that spreads bacteria throughout the opponent's body, infecting the vicitim's mental faculties. This causes Akamaru to go into uncontrollable rampage!
We were always together from
when we were little, weren’t we?
كنا معًا منذ صغرنا، أليس كذلك؟
Wir sind doch schon Freunde,
seit wir Kinder waren.
Estamos juntos
desde que éramos pequeños.
Estamos juntos
desde que éramos pequeños.
Siamo sempre stati insieme
 da quando eravamo piccoli, ricordi?
Estivemos juntos... desde criança.