Editing Soli-Tree

|image=[[File:The Soli-Tree Shot.png|250px]]

The '''Soli-Tree''' is the final area of ''[[Mario & Luigi: Brothership]]'', also serving as the final boss after [[Reclusa]] merges with it, becoming [[Weeping Reclusa]]. It is located in the [[Stormstar Sea]], at the exact center of [[Concordia]], where the original [[Uni-Tree]] once stood. The tree itself is split into three sections, each with a distinct visual flair: the lower, middle and upper levels. Due to not having a [[Lighthouse (Mario & Luigi: Brothership)|lighthouse]], the Soli-Tree cannot be linked to [[Shipshape Island]] upon completion. Its name is a play on the word "solitude" and the Uni-Tree.

The Soli-Tree has three levels: the lower level, middle level, and upper level. The lower level starts with a narrow, winding path patrolled by Reclusa's minions and Glohmed enemies. It also features flowers that release spores which forcibly separate the brothers if one comes in contact with them. If this happens, the affected brother will be rendered unconscious and warped to a designated spot in the room until the other brother finds him. This path leads to the lower level's main area, a large chamber with an elevator in the middle surrounded by eight outlets. The elevator is only accessible after lanterns are plugged into all eight outlets and lit using fire or ice balls, depending on the color. While the first lantern is located right inside the chamber, the brothers must traverse the seven other rooms linked to the chamber to find the other lanterns and carry them back to the central chambers. The paths to the connected rooms are blocked by gates, which are also opened by placing and lighting the lanterns. Regardless of which outlets the lanterns are placed in, the rooms always unlock in the same order. The first lantern unlocks the northern room, the second lantern unlocks the west, east, and southeast rooms, and the fifth lantern unlocks the southwest, northwest, and northeast rooms.

The middle level consists only of a short, one-way path that leads to the elevator to the upper level with no enemies or puzzles. However, on their way through it, Mario and Luigi get captured by Reclusa's flowers and trapped in a fantasy of a peaceful Mushroom Kingdom. The fake Mushroom Kingdom consists of a short forested path followed by bridge that leads to a wide open grassy area with a fountain in the center and Peach's Castle in the far back. There are six different versions of the fantasy. The first one simply has Peach, [[Starlow]], and the Toads congratulating Mario and Luigi on their safe return and inviting him into the castle. Entering it simply respawns them back in front of the bridge and commences the second version, where Mario and Luigi are challenged to celebratory minigames where they must climb platforms and hit an orange ! Block. On the way, there are suspicious jittering backwards ? Blocks that roll around and burst into red particles when hit, with the second one revealing Reclusa. If the brothers complete the minigame without hitting the suspicious blocks, the Toads will tell them to play again and get all blocks and [[coin]]s along the way, and the fake ? Blocks will glow, further hinting to the player that they are need to hit them to progress.

After hitting both fake ? Blocks and clearing both challenges, Mario and Luigi are invited into the castle again, commencing the third version of the fantasy. Bowser and his minions have made peace with the Mushroom Kingdom, and they are all celebrating with a feast. A Lakitu tracks the Mario and Luigi's movements with a camera, and there are invisible objects such as coin vents, wooden boxes, and platforms that can only be seen on the camera (though the shadows of the platforms are still normally visible). The camera also makes Reclusa visible, and the brothers can use it to track his position until he hides in another fake ? Block. Each time they find Reclusa, he changes the layout of the invisible platforms. After being found three more times, he leads them into Peach's Castle and changes the fantasy again. This version is similar to the previous, but omits Bowser. After finding Reclusa two more times, he loses his temper and flees into the castle again. At this point, all of the fake characters have vanished, and Mario and Luigi can head into the castle to return to the real world. The last version of the fantasy is only seen if the brothers answer "yes" to the fake Peach in the dark hallway, and only features Peach and two Toads standing in front of the fountain.

|SpaM=From ''aislar'' (both "to insulate" and "to isolate") and ''árbol'' ("tree")

|ItaM=Portmanteau of ''isolante'' ("non-conductor"), ''isola'' ("island") and ''albero'' ("tree")