Chunin level , Speed just below Kage

That night the leaf village was full of Shadows of Anbu and Root passing through as Even Danzo was curious about this elite Ninja who might destroy his various plans .

But none of them could find any abnormal chakra as Shadow clone of Shikai has already met with main body and had dispelled giving various ideas and experiences to Shikai.

after learning about the process of making an elite jounin puppet he was very much happy but to do this he should sacrifice chakra of jounin shadow to fuse with chunin shadow making elite jounin shadow .

This jounin shadow however won't have any ninjutsu, just the body strength of jounin ,can perform taijutsu and kenjutsu but it is certainly and elite Shadow puppet.

so he decided to extracted the chakra from Haku and combined it with his own chakra pool giving him the chakra level of 3 (entry level Chunin).

This process took him about 1 week so he made his shadow clone do all the chores and tasks.

During this 1 week not much happened in the leaf village , life of all Naruto's generation was going well

So after 1 week.

when Shikai was coming out of room he saw Shikamaru practicing shadow hide and shadow manipulating , seeing this Shikai asked

Shikai" brother , why are you so energetic today , are you sick you aren't the type to do all this in the early morning"

Shikamaru" well i heard there might be Chunin exam soon and Asuma sensei plan to submit our name "

Shikai hearing that suddenly remembered the chunin exam ark of the anime which was also the Konoha destruction plan of Orochimaru. so he too was planning to practice some moves now , then he look toward Shikamaru and he said

" brother, rather than practicing alone why don't we spar"

saying this he threw a kick which was avoided by Shikamaru and Shikamaru threw the shuriken which was avoided by Shikai , As Shikai focused on close combat and shikamaru in support and long range so the fight between brothers were in stalemate

As Shikai want to get near Shikamaru to attack and as Shikamaru want to get away from Shikai

then as no result was coming ,Shikamaru being the planning type he did the shadow hide and moved under the shadow and from time to time attacked with shuriken . But As Shikai focused in sensing he avoided the shuriken then thought to show Shikamaru a trick of moving in the shadow

So when Shikai went low grade shadow dive Shikamaru couldn't sense him so he thought of using eye to see but this backfired him

Shikamaru only managed to catch a black flash in the ground and was suddenly kicked in the air , then while he was flying toward the wall he again saw the black flash and Shikai came out of the shadow preventing him from crashing into the wall then put the sword in the neck of Shikamaru and said" i won"

Shikamaru was shocked for a while and then calmly asked "how was your speed so fast ,were you using forbidden technique"

Shikai" no idiot , even with big brain you can't understand , answer me what is the speed of shadow?"

shikamaru" speed of shadow , ain't it the same as light "

shikai " almost " listen here

"The speed of light (300,000 km/s). This also means that the shadow of your legs appears faster than the shadow of your head, since it's nearer to the ground.

To make a numerical example, let's assume the Sun is in the sky 45° above the horizon and you instantaneously step into the sunlight. We want to calculate .... (applying the Pythagorean theorem). Dividing this by the speed of light we get that the shadow of your head appears in about 8.2 nanoecond."

did you get that ?"

Shikamaru" well okey"

Shikai " so we being able to hide in the shadow can act similar to it but we can't handle that high speed with our body so the speed i performed is not even 10000000th of it doing math like wise {8.2 nanosecond * 10000000=82 milisecond which is 0.082 second) so converting into the speed it might be around low level jounin"

and i think even you can have this speed within 1 week of practice "

Shikamaru hearing this also formulated his plan for high level movement and throwing shuriken from different places within a second and even asked advice for close combat but the chakra couldn't handle much training and both Shikai and Shikamaru were exhausted after practicing shadow moving for 30 min directly without rest which seem to be the limit of chunin level.

Through this training it helped both of them , at the end of 2 week Shikamaru now has speed 80% of Shikai ,became master in both close and long range attack and could win with most chunin level and Shikain found the limit of chakra and body and even sharpened his Close combat and kenjutsu which now can win all chunin level and fight with special jounin too.

This Moving technique can only be performed by Nara clan so it won't harm in being shown in the Chunin exam thought Shikai , Both children's practice was seen by Shikaku so the speed of their gave Shikaku a realization and he too came to Nara clan forest and tried the technique to which he achieved the increase in speed upto 3 time ,which was the movement speed of nearly kage level so through speed only he can win against all jounin below elite level which was a big surprise for him .

so with all this in mind he called Shikai and Shikamaru and said thanks first and told them that " if someone asked you about this movement just say that i taught you so to clear any problem that may arise to you "

Shikai and Shikamaru were happy to hear that and agreed and mainly Shikai was most happiest as he doesn't had to conceal his speed ,and can secretly use the Puppet so with { speed of elite puppet + shadow speed }which might be a less than kage but enough to deal all jounin below Elite level .