IntelliHeath
As in "Heathcliff"
Remember this picture.
Yeah, it's the motivation that kept people going on to find more information in the data. People kept searching for more hints so they found some information so PushDustin found something in Smash 3DS data. I'm going to copy and paste the content that was posted in other forum.
All information should be credit to PushDustin.
Proof that the game has code to load character and stage DLC:
The shop will appear on the main menu. There is an extra Nintendo Network logo that I believe is unused.
In Japanese it will be called the "Notification Shop"
Also I think PushDustin found those following in Wii U Connectivity section. Take a good look at the bolded words.
Japanese
PushDustin's conclusion
I'm going to add my feedback on it. That would make sense why Smash 3DS' Download Package said that it required 2.1GB awhile the game that we downloaded were 1.1GB or so. I'm not saying that it would happens but who know.
Yeah, it's the motivation that kept people going on to find more information in the data. People kept searching for more hints so they found some information so PushDustin found something in Smash 3DS data. I'm going to copy and paste the content that was posted in other forum.
All information should be credit to PushDustin.
『だいらんとう大乱闘スマッシュブラザーズ for Nintendo 3DS』 のついか追加データをSDカードにつく作ります
SDカードがさ差さっていません でんげん電源をき切って SDカードをさ差してください
SDカードをにんしき認識できませんでした でんげん電源をき切って SDカードをさ差しなおしてください
ついか追加データがこわれているため SDカードに 『だいらんとう大乱闘スマッシュブラザーズ for Nintendo 3DS』 のついか追加データをつく作りなお直します
SDカードをにんしき認識できませんでした
= Messages to create data for DLC
(きょうゆう共有 is the name of the handshake icon in Japanese, which means to have jointly/ to share.
ショップ(きのう機能 is the DLC store.
Proof that the game has code to load character and stage DLC:
ui/replace/customize/spi_10
ui/script/lib
ui/replace/field
ui/replace
ui/replace/image
ui/replace/stage
ui/replace/profile
ui/replace/figure
ui/replace/customize
test/lumen/resource_font/FOLKH_Light/FOLKH_Light.brf
ui/replace/image/com_bg_d_img
effect/ui
ui/replace/mark
ui/script/util
ui/replace/item
ui/font/lumen
ui/script/app
ui/replace/popup
ui/replace/clear
ui/replace/chr
test
ui/replace/category
The shop will appear on the main menu. There is an extra Nintendo Network logo that I believe is unused.
SMASHOnlineSmash RunGames & MoreChallengeWii UStreetPassTest your skills in classic Smash! Challenge the CPU or nearby players.Connect to the Internet, and test your skills against your friends and the world!Collect boosts in a vast labyrinth to prepare for an epic final battle!Solo and group games, plus Training, custom fighters, the Vault, and more!Take on challenges and win prizes!Connect to Super Smash Bros. for Wii U.A StreetSmash of epic proportions! Defeat your rivals and win prizes!ChallengesNotificationsShop
In Japanese it will be called the "Notification Shop"
だいらんとう大乱闘インターネットフィールドスマッシュいろんなあそびクリアゲッターWii Uすれちがいきほん基本となる だいらんとう大乱闘! ひとりでも ちか近くにいるひと人とでもネットをつう通じた だいらんとう大乱闘! フレンドとも せかいじゅう世界中のひと人たちとでもきょだい巨大なせんじょう戦場をか駆けめぐり さいしゅうせん最終戦にいど挑む パワーアップがた型 アクションゲーム!ひとりで みんなで キャラづく作り きょうぎじょう競技場やコレクションもこちらじっせき実績におう応じて ごほうびをゲット!『だいらんとう大乱闘スマッシュブラザーズ for Wii U』とのれんどう連動はこちらすれちがいつうしん通信で ライバルをはじきだせ! お落としたかず数で ごほうびゲットクリアゲッターしらせショップに行く
Also I think PushDustin found those following in Wii U Connectivity section. Take a good look at the bolded words.
Connect to a Wii U
 Look for Wii U
Searching for nearby Wii U consoles...
Found [VAR] Wii U consoles!
 Search again
Connecting to [VAR]'s Wii U console...
Connected to [VAR]'s Wii U console.
is available!
is connected.
Please wait for the Wii U console.
Tap to select an option.
Disconnect
Allow copying of customized characters?
No
Yes
Go to the Nintendo 3DS connection screen in Super Smash Bros. for Wii U.
Wii U
You can exchange custom fighters or use your Nintendo 3DS as a Wii U controller.
Copying of customized characters disabled.
Copying of customized characters enabled.
Found a Wii U console!
A Challenger Approaches!
Japanese
/!Wii Uにつなげる Wii Uをさが探すちか近くにあるWii Uをさが探していますWii Uが
だい台みつかりました!
 もういちどさが探す
[VAR]のWii Uにつないでいます
[VAR]のWii Uにつながりました
のWii Uにつなげる
のWii Uにせつぞくちゅう接続中
Wii Uがだいらんとう大乱闘にはい入るまでおま待ちください
タッチしてせんたく選択してください
せつぞく接続をき切る
カスタマイズキャラのコピーをきょか許可
しない
する
『だいらんとう大乱闘スマッシュブラザーズ for Wii U』で 「3DSとつなぐ」のがめん画面にすす進んでください
Wii U
3DSほんたい本体をWii Uにせつぞく接続して カスタマイズキャラを やりとりしたり コントローラーとしてつか使うことができます
カスタマイズキャラのコピーをきょか許可しない
カスタマイズキャラのコピーをきょか許可する
Wii Uが1だい台みつかりました!
挑戦者があらわれました
PushDustin's conclusion
The game uses pictures (EFF and BCO for Japanese and English) to animate "A Challenger Appears" on the top screen, so since there is a text version in the dump, either characters are unlocked through connecting to the Wii U, or it will display the text when a character is purchased through the store. Even though I hate to admit it, it's most likely connected to the Wii U menu as there is no other text for the store (it'll probably connect to the E-Shop, or download the page from the Internet). However, there are no additional characters files in the game which severely hurts the chances of this being the case (as the 3DS would have to download quite a bit of data from the Wii U in order to utilize the character).
The 3DS can be used as a controller in 8 player Smash for the Wii U, based on the pictures with the file names: 29CE and 279A (Essentially: the 1-8 Player Icons, and numbers with pictures of 8 fighters). Files with CFC13 are the menu pictures (posted above).
I'm going to add my feedback on it. That would make sense why Smash 3DS' Download Package said that it required 2.1GB awhile the game that we downloaded were 1.1GB or so. I'm not saying that it would happens but who know.