On Saturday at 19 9pm my friend and I met in front of my others friends house.

If using 24 hour clock, pm is unneeded (19:00),

Thaen we went into it and gave our presents to our friend's mum because it was her birthday.

' in friend's is needed because of possessive

Our friend's mum was really happy about ourthe presents.

Then, my friends and me went to my friend's room and made the bed's.

A few minutes later, our Pizza coames and we ate it.

past tense needed

After we finished eating, we went back to my friends room and did put on our Pajamas.

Then, we played Mario CKart.

Cart is usually spelled with a C but in the case of the game Mario Kart, a K is used.
, needed after then

When we didn’t feel like it anymore, we played truth or dare, but after one or two rounds, we still didn’t feel like it anymore toogot tired of it.

"we still didn't feel like it anymore too" doesn't make sense.

Then, we Chatted, and ate cake and watermelon after an howur it was boring and we played Mario CKart again Weand ate Chips and Jelly bBabies.

At 12 pm we brushed our teeth and felled a st asleep.

fell is past tense of to fall
asleep is one word

The next morning, I waoke up at half past seven in the morning.

Sentence flows better if morning is only mentioned once.

I played Hayday on my phone 'till the others waoked up too.

'til is a shortened version of until
woke is the correct past participle

When everyone was awake, we talked about our Chemiestry/Chem teacher.

I think you meant chemistry teacher here.

(But not goodnicely).

not good doesn't flow well.

Then we did pullput on some other clothes and went to a bakery.

When we wasere back at the house from my friends, I mademy friend's house, I prepared some fruits for the breakfast.

some problems with tenses here.

While I madeprepared some fruits, the others set the table outside.

Making fruits is not said, prepared is a better phrasing.

When me, my friends, me and my friend's mums were outside, it started to rain.

Sentence flows better if me is placed at end or start of list.

Then, we have cleared the table and reset the table inside again.

After breakfast we played Mario CKart again, 'till ¶
my friend and I had to pack our bags and wentgo home.

On Saturday at 19 pm7:00 PM, my friend and I met in front of my others friend's house.

If you're writing American English, and probably British English, you would say 7:00 PM. If you want to use the 24 hour standard, you would just say 19:00.

Thaen we went into it (the house) and gave our presents to our friend's mum because it was her birthday.

Our friend's mum was really happy about our presents.

Then my friends and meI went to my friend's room and made the bed's.

Don't use apostrophe for plurals.

A few minutes later, our Ppizza coames and we ate it.

After we finished eating, we went back to my friend's room and did put on our Ppajamas.

Then we played Mario CKart.

When we didn’t feel like it (playing Mario Kart) anymore, we played truth or dare, but after one or two rounds, we still didn’t feel like it anymorelost interest in that, too.

Then we Cchatted and ate cake and watermelon a. After an howur, it was boring and we played Mario Cart again. We ate Cchips and Jjelly babies.

Jelly babies look like what we call "gummy bears" in America.

At 12 pmmidnight, we brushed our teeth and felled a st asleep.

12 PM == noon. 12 AM == midnight

The next morning I waoke up at half past seven in the morning.

I played Hayday on my phone till the others waoked up, too.

When everyone was awake, we talked about our Chemiestry teacher.

(But not goodin a good way).

Then we did pull on some otheput on our clothes and went to a bakery.

We walked for 15 Mminutes to the bakery and back.

When we wasere back at the house from my friends, I mademy friend's house, I prepared some fruits for the breakfast.

While I madeprepared some fruits the others set the table outside.

When I was outside with my friends, me and my friend's mums were outside, it started to rain.

Then we haved to cleared the table and set the table inside again.

After breakfast we played Mario CKart again, untill ¶
my friends and I had to pack our bags and wentgo home.