Board Thread:Episode Discussions/@comment-25319479-20170426101051/@comment-31847401-20170427043903

Guys there is no need for hyper-theories... the answer is simple.. the animal shown to be summoned by boruto was actually summoned by Mitsuki bcoz of following reasons or common sense - - Mitsuki is son (experiment) of Lord Orochimaru (whose summoned animal is a snake) - Mitsuki is an artificial human created by Lord Orochimaru..Mitsuki means 'Mi'-Snake,'Tsuki'-Vessel.. which means there is a snake chakra inside Mitsuki..giving high chakra nature to Mitsuki..which made him so strong that he could summon animal in young age - The chakra associated with the animal shown in Episode 4 is same the chakra Boruto noticed around Denki and Metal Lee in episode 2 and 3 respectively. Thus, the creature was already summoned on human plane by someone else than Boruto (i.e. Mitsuki) -also in episode 4, Konohamru homself said that Boruto doen't have the chakra to summon that beast and then camera goes to Mitsuki (hehehehehe)

Hence proved...!! LoL

Thus, it was Mitsuki who has summoned the animal shown in Boruto in Episode 4.