Not all leakers are liars as the Gematsu leaker got
, Gen 6 Pokemon/
, Miis,
,
, and
right except for Chrom and the Chorus Kid back in the day during Smash 4 speculation. Though, he could have just had outdated information as Sakurai did wanted to put Chrom in at first but decided to go with Robin instead. Plus there was a Rhythm Heaven icon in the game's files so evidence is there that Chrom and the Chorus Kids could have been intended in Smash 4 but cut.
Also, Fatman isn't a leaker he has sources and he protects those sources by not spilling the entire bowl of soup. Plus he creates theories and he puts some stuff he has heard into the mix and tries to fill out the blanks. The dude just wants to speculate and have fun just like the rest of us.
Get your head out of your *** and do some research. The Mii Costume leak and the Spirit board leak are two separate leaks that come from two different sources. The Mii costume leak coming from a source of
papagenos
. Also, Fatman doesn't backpedal from what I can recall and more info slowly keeps popping up in the insider scene so Fatman just either adds more to his theories or disregard certain stuff after hearing something different from his sources. Fatman isn't a leaker, he has sources and he create theories and puts some stuff he has heard into his theories and tries to fill out the blanks. Fatman just wants to speculate like all of us.