Belltchi woke up at 7:30 this morning (July 1)
Stats: 1 yr, 10 lbs, 1G, hungry 1, happy 0, train 0, friendship 2 1/2, character 2, 1600 p
Fed 4 meals (Pork and beans)
18 lbs, hungry 5, happy 0
So, it seems each Pork and Beans meal increases weight by 2 lbs.
Fed 2 snacks (Milk)
20 lbs, hungry 5, happy 2
Each Milk increases weight by 1 lb, and fills one happy heart.
At about 7:35 I saw her doing the pee-pee wiggle dance, and managed to activate the toilet in time. This didn't have any effect on her happy hearts, but now her train is at 3 and she has 3 friendship hearts filled in.
Because her weight was getting up there, I sent her to the Game Center for a while, to play Shoot the Bug and Long Jumper. We managed to reach 96 points in Shoot the Bug, which awarded her with 800 GP.
When she left the Game Center her stats were:
12 lbs, hungry 3, happy 5, train 3, friendship 4, 3500 p
I was curious to see if there was anything special going on in the park, early in the morning so I had Belltchi visit there. She found Memetchi there and the two of them played in the sandbox for a while.
At about 7:45 she visited the Shop. The four available food items were: Hotdog (150p), Sausage (120p), Noodles (750p), Cupcake (350p). We purchased all of them. As each was purchased, it's spot in the shop was replaced with a SOLD sign. Now there are three new items in the Meal menu: Hotdog, Sausage, Noodles. Each has a number 3 in the upper left corner, which I assume indicates how many times she can consume that item before it disappears off the menu. The Cupcake went into the Snack menu. It has the same "3" in the upper left corner.
I've confirmed that the number in the upper left corner is how many times she can consume that food. Feeding a purchased meal seems to increase weight by only 1 lb (vs. 2 lb for the Beans and Pork meal.)

At around 8:17, I noticed she seemed to be no longer inside. The background behind her was blank. When I pressed a button, the interior re-appeared.
Connection Experiments
V1 = fail
V4 = fail
V5 = pass (as Others on the Tama-Go.) Note: for V5-series Tamagotchis, when both are at the Stand-By screen, you have to press the B (middle) button on the V5. Pressing it on the Tama-Go will result in an error "Sorry!! Push key from Ver.5" Another Note: Since the family name on the V5 is limited to 5 letters, only the first 5 letters of your Tama-Go user name will appear in its listing in the V5 friends list.
MusicStar = pass (as Others on Tama-Go, and as Others on MusicStar.) At Stand-By, you can press B on either the Tama-Go or the MusicStar; both work.
The games played when connected to a V5 or a MusicStar are Piano and Bowling.
At 9:58 AM, I checked the shop, to see if it had been restocked yet. All food items still marked as SOLD.

One new feature for the Tama-Go is that you can transfer points (money) from the Tama-Go to TamaTown when you log in (and back again, when you log out.)
When I logged in to TamaTown this morning as the Tama-Go character Belltchi, I was awarded a special present - a Belltchi doll. Visting the pet shop, I purchased a cat and a hamster. When I placed them in my room, I found both are animated. The cat sleeps a lot, but when she's awake, her tail flicks slowly back and forth. The hamster cleans his whiskers, and walks around a bit - but not far from where you placed him.

Here's my TamaTown apartment.
About 10 or 15 minutes after returning from TamaTown, Belltchi beeped, lit the attention icon, and had an exclamation mark over her head. I checked her stats, but her hungry hearts were already full, and her happy hearts were also already full. After giving her a Time Out, everything went back to normal.
Stats: 10 lb, hungry 5, happy 5, train 4, friendship 6, 6770 p
At 10:51 AM, I checked the shop again. All food items still marked as SOLD.
At 11:06 AM, I checked the shop again. It's been restocked! Current items are Hamburger (240p), Fried Chicken (320p), Hot Dog (150p), and Ice Cream (200p.) The four available Remodel selections are the same as they were last night.
Update about Ringotchi Character Figure:
There are two games, not just one.

When the name "Monster Beater" appears, there's a small triangle to the right of it. Press the A button to cycle through to the next game selection. The second game on the Ringotchi Character Figure is Shape Shooter.

When either game is selected, you're requested to select who will play the game. Press A to change the selection, press B to accept that player.

Monster Beater. Press A and C to move the cross-hairs. Press B to blast the monster. But be quick, he's not going to stand there waiting for you forever.

Shape Shooter. Press B to change the shape shown at the bottom to match the shape of the falling object. Press A to launch it at the left or press C to launch it at the right. Throw the correct shape before the falling object reaches the bar.
Speaking of Character Figure games... I have an update on the Cradles game.

Here's a photo of the included Mametchi Character Figure's game Cradles. You control a set of claws at the top of the screen holding a baby. One or more cradles float back and forth, lower down the screen. Press A or C to move the claws. Press B to release the baby. I hope you didn't miss. Note: cradles that have caught a baby don't move any more.
That's it for now.
(If you have any questions, please feel free to post them as replies to this topic.)