Time skip it's just leaving Italy and going back to Namimori.

"Meow(Kyoya I'm back, Is everyone ready)!" Tsuna meowed as he apruptly burst into Kyoya's mansion and sat on his head.

"Hn Baby Carnivore(We're ready, Baby Carnivore)." Kyoya stated while his mother brings in the other family members that wanted to help destroy the Estraneo. Fon was there as well in infant form.

"Meow(Ok, the Estraneo base is in the abandoned Kokuyo land)!" Tsuna meowed and they soon left the mansion.

Time skip it's just them finding the base.

"Meow(Found the entrance)!" Tsuna meowed as he looked down at the entrance in the middle of a hole with huge trees covering it. The others soon joined him peering down at it.

"I wonder how they even make it down there." One of the Hibari's commented and Tsuna agreed before finding a button that clearly did not blend in with the foliage, to him anyway.

"Meow(Like this)." Tsuna meowed pressing the button and a metal ladder shot out of the hole.

"Hn(That button was not obvious to the human eye)." Another Hibari hned noticing that the button was almost the same color as the foliage.

"Meow(Let's go)!" Tsuna meowed as he leaped down the hole and landed next to the door. Kyoya jumped in afterward with the rest climbing down the ladder. Without prompting Kyoya kicked down the door and caused the alarm to go off.

"Meow(Kyoya! You were supposed to wait me and Fon go full size)!" Tsuna meowed and Kyoya just hned in reply entering the base without them. Tsuna shook his head and tapped Fon's pacifier allowing him to grow to adult form before growing to adult form himself.

"Thank you Tsunayoshi." Fon said as they entered the base. Kyoya was already fighting a few guards.

(AN: This is where things get a little confusing because I didn't plan this out fully even though future chapters are already planned out and some are even done)

Tsuna pounced on the nearest enemy who happened to have mist flames, once he plunged his claws into the back of the neck. In a instant all the flames were absorbed and a strange change happened, a mist flame burned brightly on his head and his body blurred with a thin layer of mist.

His now indigo eyes glowed brightly as he seemed to change into a terrifying monster to his enemies. Frozen with fear the enemies were easy pickings for the Hibaris' and Fon. Enemies with mist flames tried to attack them with illusions only for a barrier of mist to appear and deflect the illusions.

Tsuna blurred before the line of enemies and defeated them in an instant by using the mist to lock their consciousness in their minds. He continued on defeating enemies utill he reached the room he sensed Mukuro in.

Busting down the door, he attacked the scientists about to kill the children they were using as experiments. Instead of locking them in their minds mercifully in a fit of anger he burned their souls to ashes and made their bodies as puppets to attack their allies while he tended to the children.

The mist flame on his forehead vanished as it ran out of power and he started healing the children's' injuries they looked to him like he was angel before falling asleep due to fatigue.

"You're all going to be alright now." Tsuna promised as he healed them. He soon reached Mukuro who looked at him dazed.

"Oh my poor poor Muu-kun, you went through a lot didn't you." Tsuna whispered taking the straps holding him on to the table off and lifting Mukuro into a more comfortable position.

"Tsu-Tsuna? Is *cough* t-that y-you? *cough*" Mukuro coughed out his eyes brightening up with recognition and happiness.

"Muu-kun? You transferred to this world too!" Tsuna said excitedly and hugged Mukuro.

"Kufufu *cough* I did but I e-experienced m-much w-worse t-than b-before *cough* uhh." Mukuro said shakily while coughing as Tsuna started healing him.

"Shh shh Mukuro just rest." Tsuna said patting his head as he slowly fell asleep. Tsuna looked sadly as he saw all the incisions on Mukuro, proof that he was brutally experimented on.

"You're safe now Muu-kun. I bet Chrome will be happy when she sees you again." Tsuna said smiling as he he set Mukuro down lightly.

Tsuna's intuition suddenly screamed got him to move but it was too late as he saw a purple Bazooka descend on him.

AN: And cliffhanger! Ugh I'm finally done with this chapter and the next chapter is a little funny extra as a surprise for waiting.