Digimon Adventure (PSP, English Sub): Part 4: Episode 3
4Whether it's Main Episodes or Sub-Episodes, the game will constantly change your leader between episodes. The leader can't be switched out, but the two other party members next to them can be. There are rare exceptions where this DOES happen DURING an episode, though.
This Main Episode appoints Yamato/Matt as the leader.
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The kids and their Digimon leave the beach after Greymon's efforts save them from a nasty Shellmon. They were now on the search for more humans on the island.
The sun was setting, and the kids were still hungry. Luckily, Tentomon smell a nearby like, where Matt decided that they should all head there and set up camp.
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With Matt as the leader, Gabumon is a permanent battle party member for this episode. Even then, I suggest keeping Tai & Agumon in your active party since Agumon is the only one that can Digivolve...
...for now.
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The group quickly reach the lake Tentomon smelled, and were ready to set up camp for the upcoming night.
At the lake, they noticed a trolley car. They check it out for some more humans, but sadly it was empty. For now, they decided to just prepare their camp by gathering food and materials in a nearby forest.
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I have to mention at this point that the common enemy variety won't be too grand. You're mostly going to be fighting Numemon, Mushmon, Betamon and the occasional tougher Kuwagamon and Monochromon.
You'll be collecting DigiBananas, DigiMushrooms, DigiApples, and some Firewood! Then return to the trolley and prepare the camp.
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It was now nighttime. During a gathering, you'll use Matt with some oppotunities to increase is Bonding Rank between himself and Mimi, Sora, and Izzy.
The kids and their Digimon afterwards start to prepare for their sleeptime, though one of them will have to keep watch for enemies. T.K. wanted to handle it, but Matt made him rest, instead.
Tai suddenly got curious about Gabumon's pelt and try to take it off of him. Matt got angry at Tai for it, and the two nearly got into a fight, which distressed poor T.K. From there, Tai decided to take guard watch, and Matt will follow after him.
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Matt sat alone to play his favorite harmonica. He was thinking to himself why he got so angry at Tai earlier and wanted to check up on him.
Do that, any make him apologize for their fight, and the two's Bonding Rank will rise.
From there, Matt finally reveals to Tai his deal with T.K....
Yamato Ishida and Takeru Takaishi are actually brothers. They have different last names because their parents are sadly divorced. Matt lives with their dad, while T.K. lives with their mom...
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Speaking of T.K., he had to go potty, but then had encountered another menacing Digimon: A Seadramon!
Sensing his little brother in danger, Matt sprung into action to protect him at all cost! This was, however, a very dangerous endeavor for the boy to handle by himself!
T.K. begged Gabumon to help Matt out before something terrible happens to him, but Gabumon feared that he wasn't strong enough.
But knowing that his human partner was in trouble Gabumon knew he had to find some kind of strength to save him, or else he'll never be able to here his harmonica again.
And so... Gabumon did... in the same way that Agumon earlier did to help Tai...
*Gabumon Digivolved to... GARURUMON!*
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Do now you have TWO Champions on your side. Garurumon will be evolved from the start of the fight against Seadramon. You're free to have Greymon join in too, if you want.
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Through Garurumon's power, Gabumon was able to save Matt and the others from the angry Seadramon.
T.K. also saw part of this effort as something his big brother was able to do, as well, but Matt was shy and tried to brush this off.